3. In the figure below, the coefficient of sliding friction for all contact surfaces is 0.20. When the system is released from rest, a) What is the constant acceleration of the system? b) What is the tension in the cord connecting blocks A and B? c) What is the tension in the cord connecting blocks B and C? 3 kg

3. In the figure below, the coefficient of sliding friction for all contact surfaces is 0.20. When the system is released from rest, a) What is the constant acceleration of the system? b) What is the tension in the cord connecting blocks A and B? c) What is the tension in the cord connecting blocks B and C? 3 kg

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 58PE: A soft tennis ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of...

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A block of ice (m = 15.0 kg) with an attached rope is at rest on a frictionless surface. You pull the block with a horizontal force of 95.0 N for 1.54 s. a. Determine the magnitude of each force acting on the block of ice while you are pulling. b. With what speed is the ice moving after you are finished pulling?
A soft tennis ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of 1.10 m. (a) Calculate its velocity just before it strikes the floor. (b) Calculate its velocity just after it leaves the floor on its way back up. (c) Calculate its acceleration during contact with the floor if that contact lasts (3.50103s). (d) How much did the ball compress during its collision with the floor, assuming the floor is absolutely rigid?
In Figure P1.84, the pulleys and the cord are light, all surfaces are frictionless, and the cord does not stretch. (a) How does the acceleration of block 1 compare with the acceleration of block 2? Explain your reasoning. (b) The mass of block 2 is m2 = 1.30 kg. Derive an expression for the acceleration of the block having mass m2 as a function of the mass of block 1, m1. (c) What does the result of part (b) predict if m1 is very much less than 1.30 kg? (d) What does the result of part (b) predict if m1 approaches infinity? (e) In this last case, what is the tension in the cord? (f) Could you anticipate the answers to parts (c), (d), and (e) without first doing part (b)? Explain. Figure P1.84
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1.) Consider the diagram below. Mass Ma = 5kg and Mb = 50kg. The coefficient of kinetic friction between the black Ma and the table top is .2 = uk. Assume the tension in the cord is uniform throughout its length, the acceleration of each block is the same, and the pulley has no mass or friction. Calculate: a.) The acceleration in the system. b.) The tension T in the cord. mA mB
2. A massless string connects two blocks over a frictionless pulley, as shown in the diagram. I 0.80 kg Px =0.14 %3D 600 HK = 0.14 20 kg a Determine the acceleration of the blocks. b. Calculate the tension in the string. c. If the string broke, for what minimum value of the coefficient of static friction would the 2.0-kg block not begin to slide?
3. Two blocks with unequal masses, M and m (M> m), are connected by a light, very long string passing over a pulley of negligible mass, as shown in the figure, and then released. Friction is negligible. a. If one of your classmates calculated that, once released, the acceleration of the blocks would be g, '6 without doing any calculations, say whether or not this could be a reasonable value for the acceleration. Draw and label a free body diagram (FBD) for each block. (Be sure your drawings show clearly any information you know about the directions and relative magnitudes of the forces.) Rank the relative magnitudes of all forces in your FBDS. (I'm looking for a single ranking that includes every different force drawn and labeled in both FBDS, separated by , or =.) heavy block: b. light block: relative sizes of all forces in FBDS: C. Use the FBDS from the previous part, and Newton's 2nd Law, to derive an expression (in terms of M, m and g) for the acceleration of the blocks once…
A box is being pulled to the right over a rough surface. T> fk, so the box is speeding up. Suddenly the rope breaks. What happens? The box Select one: a. Slows steadily until it stops b. Continues with the speed it had when the rope broke С. Continues speeding up for a short while, then slows and stops. O d. Keeps its speed for a short while, then slows and stops. e. Stops immediately