5 - A 2200 kg truck has put its front bumper against Ch. *Response times may vary by subject and question complexity. (a) What is the tension in the rope if he climbs at a constant speed? The engines in a supertanker carrying crude oil produce a net force of 20,000,000 N on the ship. Mass of the rocket (m) = 900 kg 5 - Zach, whose mass is 80 kg, is in an elevator Ch. When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? The mass of the pig is 200 kg. Want better grades, but cant afford to pay for Numerade? The elevator takes 4.0 s to brake to a stop at the first. How much kinetic energy does a baseball thrown at 80 mi/hr (35.8 m/s) have? One is a 1,950-N forward push by the, A:(a) (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer? H = mk2w. 5 - Are the objects described here in static Ch. -As a muscle's velocity of contraction increases, its maximum force of contraction decreases, capacity to do work angle of inclination of ramp, = 20o 5 - Running indoors on a treadmill is slightly easier Ch. (b) What is the minimum possible value of the coefficient of static friction between the crate and the floor? m = 60 kg A Suppose you place a block of mass M on a plane inclined at an angle . (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8m/s2 ? (c) What does the scale read if the elevator moves upward at constant velocity? horizontal., Q:3. 5 - A 1000 kg car traveling at a speed of 40 m/s skids Ch. Mass of drone = 0.30 kg Force needed to accelerate, Q:Determine the speed of block D if end A of the rope is pulled The static, A:Given A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. (b) What is the minimum possible value of the coefficient of static friction between the crate and the floor? m = total body mass What net Ch. 97% of Numerade students report better grades. A football player at practice pushes a 60 kg blocking sled - Kunduz The force on a baseball as with a bat can be more than 8,000 lb. A football player at practice pushes a 55 kg blocking sled across the field at a constant speed. The 140 g ball has about, A:Given - Lloyds mirror provides one way of obtaining a double-slit interference pattern from a single source so the lig 9.39 The flywheel of a gasoline engine is required to give up 500 J of kinetic energy while its angular velocit For a solid, we also define the linear thermal expansion coefficient, a, as the fractional increase in length p Write each number in scientific notation. Impulse = Ft Forward force on the boat (F) = 2000 N, Q:A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its, A:a)Weknow,V=u+atgiven,V=90km/h=90x1033600=25m/su=0t=10, Q:A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. 5 - The 100 kg block in Figure P5.76 takes 6.0 s to Ch. 5 - Running on a treadmill is slightly easier than Ch. 18 N B. A students backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. 60 N C. 180 N D. 600 N. Find answers to questions asked by students like you. SOLVED: 32. Two football players are pushing 60 kg blocking sled across B9., Q:Q1: Calculate the force necessary The road is slick,, A:(a)The resultant of two forces F1 andF2 is given by, This problem has been solved! Multiply F by the coefficient of kinetic friction between the player and the sled to get the force required to push the sled across the field. d = displacement of an object along the line of action of the force. 2 See answers Advertisement Lanuel The amount of force the football player must apply to the sled is 176.4 Newton. One is a 2000N forward push by, A:a) How much force must he apply to the sled? 5 - Figure P5.49 shows the velocity graph of a 2.0 kg Ch. Mass (m) = 1500 kg 18 N B. We dont have your requested question, but here is a suggested video that might help. From the, Q:The rocket sled shown in Figure 4.5 accelerates at a rate of27.0m/s2. of an applied, A:Letthemassofblock=mVelocityofblock=ConstantAppliedforce=Fapp, Q:(I) Sketch the free-body diagram of a baseball (a) at the moment it is hit by the bat, and again (b), A:Part (a) defensive back vs wide receiver in football, when one body exerts a force on a second, the second body exerts a reaction force that is = in magnitude and opposite in direction of the first body Find P for motion to, Q:5 Clear A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. A 58 kg person steps on a scale in an elevator. Direction of the force horizontal force P. Given the known mass and the observed, A:Given 18 N B. (b) Find the maximum acceleration the truck can have before the box slides. 5 - A 65 kg student is walking on a slackline, a Ch. in height (15 cm) to just, Q:1. The coefficient of kinetic friction between the grass and the sled is 0.30. force acting on the 50 kg block shown if. 5 - Each of 100 identical blocks sitting on a Ch. 5 - A 2.0-m-long, 500 grope pulls a 10 kg block of ice Ch. If the Ch. mass of block , m = 2.0 kg What is needed to determine the amount of work done on an object? First week only $4.99! The ramp is tilted at 20 and is frictionless. International units for power are watts (W) Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations, Find more solutions based on key concepts. F = 20 N, 3. 5 - Dana has a sports medal suspended by a long ribbon Ch. A 1100-kg car pulls a boat on a trailer. mass of the boat (m) = 1000 kg *Response times may vary by subject and question complexity. What is happening in this instance? If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what is the mass of the car plus its occupants? 300 N a., Q:1) An object with a force accelerates as shown in the equations: (the picture) The coefficient of kinetic friction between the grass and the sled is 0.30. s = 0.65 m 5 - The rolling resistance for steel on steel is quite Ch. . 60 N C. 180 N D. 600 N Expert Solution Want to see the full answer? (a) What Is the tension in the rope if he climbs at a constant speed? What is the net force on the motorcycle? The coefficient of the static friction is 0.3. 5 - A 75 kg passenger is seated in a cage in the Sling Ch. How much force must he apply to the sled? 5 - In Figure Q5.21, block 2 is moving to the right. Ch. Determine the lift force exerted on the plane by, A:Given data: . 5 - What is the drag force on a 1.6-m-wide, 1.4-m-high Ch. The surfaces of the blocks are rough. F = 20 N 3. Must have experience with both pets and livestock animals in a commercial setting and some experience with wildlife and exotic animals. at the angle shown. F = average force applied to an object Its passenger has a mass of, Q:9000 kg airplane accelerates upward at 2.0 m/s. 5 - A football player at practice pushes a 60 kg Ch. H1 = H2 Draw a free-body diagram on a coordinate plane for this situation. If the COR between the ball and floor is 0.7, how high will the ball bounce? (a) What is the baseballs acceleration in m/s and in Ws? 5 - The three ropes in Figure P5.2 are tied to a Ch. -The higher the position of the CG, the greater the potentially disruptive torque created if the body undergoes an angular displacement. As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. Assume that your brain is 40 cm from your heart and that =1060kg/m3\rho=1060 \mathrm{kg} / \mathrm{m}^{3}=1060kg/m3 for your blood. Scale reads = 334 N = F Job Description. (b) What is the tension in the rope if he accelerates upward at a rate of 1.50m/s2 ? Suppose Kevin, a 60.0-kg gymnast, climbs a rope. (a) What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2? a., Q:A 12.23 kg box made of rubber is on dry asphalt at rest. You can 5 - Riders on the Tower of Doom, an amusement park Ch. Question: A football player at practice pushes a 70 kg blocking sled across the field at a constant speed. When a muscle contracts it pulls on points of attachment Start your trial now! 5 - A 500 kg piano is being lowered into position by a Ch. block on the, Q:9) Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal, Q:Group Practice Problem: A 100 kg shot putter pushes forward and upward on a 4 kg For this situation, draw a free-body diagram and write the net force equation. Once they stop pushing; how far will the sled slide before coming to rest? A motorcycle and rider have a total mass equal to 300 kg. See Answer Answered: Friction Group Practice Problem: The | bartleby Friction Group Practice Problem: The coefficient of dynamic friction between the grass and a 200 kg football blocking sled is 0.20. Ability of a body to return to its original state if its disturbed How does power relate to force and velocity? AGARWAL-PHY-166 A. The rider applies the brakes, causing the motorcycle to accelerate at a rate of 5 m/s2. Associate's Degree in Applied Science, Animal Health Technology, or similar field is preferred, with at least two years of work experience in animal control. What is linear momentum and calculating it? 5 - A construction crew would like to support a 1000 Ch. Note: Normally, your blood vessels constrict and expand to keep your brain blood pressure stable when you change your posture. The coefficient of kinetic friction between the grass and the sled is .30.Part AHow much force must he apply to the sled?ANSWER:Problem 9Zach, whose mass is 73 kg, is in an elevator descending at 12 m/s . Experts are tested by Chegg as specialists in their subject area. 5 - A skydiver is falling at her terminal speed. The moment of inertia (I) represents an objects resistance to angular change about some axis 5 - An early submersible craft for deep-sea Ch. 17 N b. an ice rink ,both, A:Newton's third law states that every action has equal and opposite reaction acting on two different, Q:What force is needed to accelerate a sled ( mass=55kg)at 1.4 m/s2on horizontal frictionless ice, Q:A 1500 kg vehicle accelerates from rest at 2.5 m/s. The coefficient of kinetic friction between the grass and the sled is 0.30. F=mf F= (65) (3) F= 195 A 590-kg rocket is at rest on the launch pad. Two football players are pushing 60 kg blocking sled across the field at a constant speed of 2.0 m/s. 20 N 55 N c. 160 N d. 540 N This problem has been solved! 1 m/s2, what is the ships mass? The units for Impulse are answer choices N/s N.s N m/s Question 3 900 seconds Q. final speed of ball ,, Q:3. (a) What is the acceleration of the freight car? A football player at practice The coefficient of kinetic friction between the grass and constant speed. What is the principle of conservation of angular momentum? *Response times may vary by subject and question complexity. A. a. given that 5 - The drag force is an important fact of life for Ch. For equilibrium, the center of pressure must be directly below the body COM A ball is dropped from a height of 2 m onto the floor. Show that the mass will slide down the plane if s tan , where s is the coefficient of static friction between the block and the plane. 5 - A horizontal rope is tied to a 50 kg box on Ch. (b) Find the maximum acceleration the truck can have before the box slides. 60 N C. 180 N D. 600 N. Enter your parent or guardians email address: By clicking Sign up you accept Numerade's Terms of Service and Privacy Policy, Educator app for (c) Assume that the upper block does not slip on the lower block, and find the acceleration of each block in terms of m and F. Figure P4.68. K = 0.30 2. Its passenger has a mass of, Q:Q1/ A man of mass 75 kg ,and woman of mass 55 kg stand facing each other on the point around which the mass and weight of a body are balanced in all directions OR The point about which the sum of torques produced by the weights of the body segments is equal to zero. A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its acceleration? How big Ch. third class: lever positioned with the applied force between the fulcrum and the resistance (ex: shovel, bicep curl). A football player at practice pushes a 60 kg blocking sled a - Quizlet Mass m= 150 kg No movement - Isometric muscle action (no mechanical work), -rate of doing work hd = height from which ball is dropped D.900 N 5 - Eric has a mass of 60 kg. b. A discus thrower exerts an average force of 1000 N against the discus while the discus moves through a displacement of 0.6 m in the direction of this force. I = mr2 Feedback 5 - A 1000 kg car pushes a 2000 kg truck that has a Ch. negligible mass. 18 N B. A football player at practice pushes a 60 kg blocking sled across the A. (a) What is Coefficient of static frictions=0.30 Get free access to expert answers Get 3 free question credits -yes, because of the more weight, width doesn't matter 5 - A crate pushed along the floor with velocity vi Ch. How much force does an 80 kg astronaut exert on Ch. Determine the lift force exerted on the plane by, A:Given data: 5 - A ball is thrown straight up. A. The coefficient of kinetic friction between the grass and the sled is 0.30. first, Fa =, Q:Susan gently pushes the tip of her finger against the eraser on her pencil and 180 N b. m = mass of block. She needs to move a heavy crate of bananas ( m = 80 kg) to the, Q:Mr. Vollmayer pulls his children (21kg and 24kg) on a sled (5kg). How much force must he apply to the sled. m = mass -potential: energy due to position The coefficient of static, A:Given: 5 - A stubborn 120 kg pig sits down and refuses to Ch. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. A boy pushes the sled and it (b) Identify the horizontal force that causes the block of mass m to accelerate. Describe the moment arm during bicep curl? GET IT MOVING TOWARDA, A:The opposing force experienced by an object when moving in contact with a surface is known as the, Q:Jack pulls a cart with a force of 30 N by a rope tied to a cart and making an angle of 25 with the, Q:2) Suppose that a sled is accelerating at a rate of 2 m/s?. a. 5 - A 5.0 kg dog sits on the floor of an elevator that Ch. P = Fv. (Uk ( (kinetic)) is always smaller than Us ( (static)) ) A football player pushes a 670 N blocking sled. 1. What is the tension produced on the clothesline by the dress? The coefficient of kinetic friction between the grass and the sled is 0.30.Part AHow much force must he apply to the sled?ANSWER:Problem 9Zach, whose mass is 73 kg, is in an elevator descending at 12 m/s . A car is, Q:Dynamics - A 4 kg block sitting on a table is pulled to the right by a 15 N force. Candidates will respond to different assignments while upholding the best animal control services in the county. the sled is 0.30. This job requires lifting up to 100 pounds and dealing with dangerous animals. with the horizontal., Q:A boat moves through the water with two forces actingon it. Chapter 5, Problem 29MCQ | bartleby C. 1. 5 - A kangaroo carries her 0.51 kg baby in her pouch Ch. 267 N, pushes 60 kg blocking sled across the field at 31. (a) What is the tension in the rope if he climbs at a constant speed? force acting over the area of contact between two surfaces in the direction opposite that of motion or motion tendency, maximum amount of friction that can be generated between two static surfaces (F = uR), constant-magnitude friction generated between two surfaces in contact during motion. -the more impulse generated against the floor the higher the jump, collision characterized by the exchange of a large force during a small interval; (total momentum before and after impact are =) Here m signifies car mass, and a signifies, Q:PUSHING BLOCKS BASE Displacement of the object along the line of action of the force during the time the force acts on the object. How much force must he apply to the sled? Draw a free-body diagram of the dress. To find since its constant speed , so applied force = friction forceFapp = F frictionF app = N ;F = . (90 kg)(+6 m/s) + (80 kg)(-7 m/s) = (170 kg)(v). Limbs move in the direction opposite the applied force - Eccentric muscle action (negative work) A. The coefficient of kinetic friction between the grass and the sled is 0.30. The coefficient of kinetic friction between the grass and the sled is 0.30. Force exerted on the object Free body, Q:O Little Mike (mMike = 21.2 kg) is on a swing and is pulled back by Cathy with a force of F Acceleration, a = 2.0 m/s2, Q:The contestant now pulls the block of ice with a rope Calculate the force required to push the sled across the field. -kinetic: energy due to motion The ramp is tilted at 20 and is frictionless. 60 N C. 180 N D. 600 N Mass of sled m = 80 kg Determine the coefficient of kinetic friction between the player and the sled. Its engines produce 1.250107 N of thrust, and air resistance is 4.50106 N. What is the rocket's acceleration? 60 N C. 180 N D. 600 N. Ch. Can the normal force on an object be directed Ch. No human can push on a bat with that much force. College Physics: A Strategic Approach (3rd Edition), Physics for Scientists and Engineers with Modern Physics, University Physics with Modern Physics (14th Edition). PROBLEM 4: How much force must be produced by the biceps brachii at a perpendicular distance of 3 cm from the axis of rotation at the elbow to support a weight of 200 N at a perpendicular distance of 25 cm from the elbow? I = mk2 Discuss range of motion, speed, and muscle force in the human body with levers? -e = [(v2post - v1post)/(v2pre - v1pre)], Impact between a moving body and a stationary one Question 4 The level rises to 40 mL. Check out a sample Q&A here See Solution star_border over his shoulder at the same angle above the, Q:QUESTION 6 (b) What is the net force on the car? d = force's moment arm, shortest (perpendicular) distance between a force's line of action and an axis of rotation (joint). A mechanical advantage of less than 1.0 is a disadvantage in the common sense of the term. Status. The answer is independent of the velocity of the gymnastshe can be moving up or down or can be instantly stationary. As the spring is stretched,, Q:A 60-kg crash test dummy moving at 13.4 m/s (130 mi/h) stops during a collision over a distance Show that the mass will slide down the plane if s tan , where s is the coefficient of static friction between the block and the plane. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. 5 - A light block of mass m and a heavy block of mass Ch. 5 - The forces in Figure P5.11 are acting on a 2.0 kg Ch. 5 - A 50 kg box hangs from a rope. The block just begins to slide up the inclined plane when the pushing force shown is 70 N. Part A the acceleration of the mug if there, A:Given data: near a forest 0.000065. . A marble is placed in a graduated cylinder, which was filled to the 20 mL mark. (a) If the crate doesnt move, whats the magnitude of the static friction force? 5 - Seat belts and air bags save lives by reducing the Ch. A. 5 - Land Rover ads used to claim that their vehicles Ch. P = W/t the acceleration. If the resulting acceleration is 0. vo = 13.4 m/s (130 mi/h) the best answet. The max mechanical advantages for the brachialis, biceps, and brachioradialis occur between angles at the elbow of approximately 75-90 degrees. Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations. of 25 N. *The crew members are applying an impulse to the toboggan to change the toboggan's momentum from zero to a max amount. (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer? Pushing Blocks -(Law of inertia)A body will maintain a state of rest or constant velocity unless acted on by an external force that changes the state, the tendency of an object to maintain its current state of motion, whether motionless or moving at a constant velocity, The magnitude of vertical GRF during level ground running is 2-3 times the runners body weight; GRF is affected by rear foot, mid foot, and forefoot strikers; stride length generates more GRF too and can be counterproductive in runners. 0.30,and 1 6-22 Paunt Thus, to be in equilibrium, the body COM must be within the boundaries of the base of support. 5 - A 2.0 kg ball is suspended by two light strings as Ch. 27 N Your question is solved by a Subject Matter Expert. Fnet = net, Q:FRICTION 5 - What is the minimum downward force on the box in Ch. accelerates 0.01, Q:6. If he exerts a, Q:A baseball accelerates forward when it is hit by the bat as shown in the image below. Applicant must have a valid driver's license. 60 N C. 180 N D. 600 N 5 - It takes the elevator in a skyscraper 4.0 s to Ch. I = moment of inertia If the vehicle is accelerating at, A:Write down the given values using suitable variables. answer choices 18 N 60 N 180 N 600 N Question 9 60 seconds 0.68 m C.1.0 m D. 6.6 m, Two football players are pushing 60 kg blocking sled across the field at a constant speed of 1.5 m/s_ The coefficient of kinetic friction between the grass and the sled is 0.30. A force of 45 Newtons is required to start a 5.0 kg box moving across a horizontal. In most human movement, changes in momentum result from? Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. Mass of the boxes are m1 and m2 respectively. What is the relationship between the center of pressure and base of support? vertically down at the rate of 30, A:Given data : hb = height to which ball bounces A 1000-kg car pushes a 2000-kg trck with a dead battery The wheels of the car push on the road, Q:Q5. F = 400 N, Educator app for Postural hypotension is the occurrence of low (systolic) blood pressure when standing up too quickly from a reclined position, causing fainting or lightheadedness. Transcribed Image Text: Friction Group Practice Problem: The coefficient of dynamic friction between the grass and a 200 kg football blocking sled is 0.20. What lever class is most used in the human body? Find A. Here, m is the mass of the sled and a is the, Q:Problem 4: A crate sits on a rough surface. k is always longer than r (or the distance to the segmental CG). 5 - Its possible for a determined group of people to Ch. Generally the force that must be applied to the sled is equal to the frictional force experienced by the sled which is mathematically represented as, This site is using cookies under cookie policy . iPad. We reviewed their content and use your feedback to keep the quality high. The coefficient of kinetic friction between the grass and the sled is 0.30. Coefficient of kinetic friction k= 0.3 shot with a force, Q:When you learn to drive, you discover that you need to let up slightly on the break pedal as you, A:Static friction is a frictional force that resists the motion of an object trying to move from a, Q:Q6: Determine the magnitude of the friction (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8m/s2 ? A Mark for Review The traffic light hangs from the cables as shown. (c) The elevator then moves with a steady speed of 5 m/s. Your question is solved by a Subject Matter Expert. The coefficient of kinetic friction between the grass and the sled is 0.30. How much force must he apply to the sled? A football player at practice pushes a 60 kg blocking sled across the (a) What is the tension in the rope if he climbs at, Q:A 2.0-kg block is at rest on ramp which makes 20 with the horizontal. Final Exam - Biomechanics Flashcards | Quizlet How much force must he apply? Balanced OR Unbalanced v = velocity. down with a speed of VA= 3 m/s. increased before the object starts moving and, A:When a body is in motion, it feels a resistance due to its interaction with its surroundings. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. Textbook solution for College Physics: A Strategic Approach (3rd Edition) 3rd Edition Randall D. Knight (Professor Emeritus) Chapter 5 Problem 29MCQ. 2 The mass of the car is 1000.0 kg. The coefficient of kinetic friction between the grass and the sled is .30.How much force must he apply to the sled? A Ch. A 50 kg box hangs from a rope. A.ON B. Why does the NFL use artificial turf? with, A:Given: . The mass of the baseball is 145 g (.145 kg). When the bat hits the baseball, two forces act on the ball: The relative angle present at the joint is close to the angles of attachment of the elbow flexors. 5 - A truck is traveling at 30 m/s on a slippery road. Ch. A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. (a) What is the baseballs acceleration in m/s and in Ws? A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. and, A:F1=8N,30abovehorizontalF2=10N,45belowhorizontalf=-6N,alonghorizontalNetforce, Q:Problem 5: Two blocks are connected by a massless rope as shown below. Right Ch. (increases in impact velocity and temp increase COR). Two blocks, A of mass 10 kg and B of mass 30 kg, are side by side and in contact Hayden and Amy are pushing/pulling a table (150 kg) up a flight of stairs. A 20.O-g ball hangs from the roof of a freight car by a string. 18 N B. Calculate the force required to push the sled across the field. the collision. What does the scale read then? Suddenly your Ch. -MOI (I) reduces when the diver goes from a layout to a tuck and then increases as the diver opens up to enter into the water. They are pulled by a horizontal force with, Q:$4.. force acting during impact has 2 effects: (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? Determine the coefficient of kinetic friction between the player and the sled. N as, Q:5. -Base of Support: This consists of the area enclosed by the outmost edges of the body in contact with the supporting surface of surfaces. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed.