|| Atwood’s machine. A 15.0 kg load of bricks hangs from one end of a rope that passes over a small, frictionless pulley, called an Atwood’s machine. A 28.0 kg counterweight is suspended from the other end of the rope, as shown in Figure 5.61 The system is released from rest. (a) Draw two free-body diagrams, one for the load of bricks and one for the counterweight. (b) What is the magnitude of the upward acceleration of the load of bricks? (c) What is the tension in the rope while the load is moving? How does the tension compare to the weight of the load of bricks? To the weight of the counterweight? Figure 5.61 Problem 54.
|| Atwood’s machine. A 15.0 kg load of bricks hangs from one end of a rope that passes over a small, frictionless pulley, called an Atwood’s machine. A 28.0 kg counterweight is suspended from the other end of the rope, as shown in Figure 5.61 The system is released from rest. (a) Draw two free-body diagrams, one for the load of bricks and one for the counterweight. (b) What is the magnitude of the upward acceleration of the load of bricks? (c) What is the tension in the rope while the load is moving? How does the tension compare to the weight of the load of bricks? To the weight of the counterweight? Figure 5.61 Problem 54.
|| Atwood’s machine. A 15.0 kg load of bricks hangs from one end of a rope that passes over a small, frictionless pulley, called an Atwood’s machine. A 28.0 kg counterweight is suspended from the other end of the rope, as shown in Figure 5.61 The system is released from rest. (a) Draw two free-body diagrams, one for the load of bricks and one for the counterweight. (b) What is the magnitude of the upward acceleration of the load of bricks? (c) What is the tension in the rope while the load is moving? How does the tension compare to the weight of the load of bricks? To the weight of the counterweight?
Jene is rearranging her furniture. She pushes her 400.0kg couch with a force of 300.0N at 30.00 from the horizontal. The coefficient of static friction between the couch and the carpet is 0.30. Draw a free body diagram for the couch. Will the couch move? why or why not.
sits on it.
at a constant velocity?
A 26 kg desk is at rest on the floor. The coefficient of stat
friction is 0.25. One person pulls on the desk with a force
of 52 N [E] and another pulls with a force of 110 N [W]
Will the desk move? Explain your reasoning. T
nitting in a parking lot. The coefficient
The two blocks are connected by a massless uniform rope. An upward force of 150 N is applied as shown in the figure below.
(a) Draw three free-body diagrams: one for the 6.00-kg block, and another one for the 5.00-kg block. For each force, indicate what body exerts that force.
b) What is the acceleration of the 5.00-kg block?
c) What is the tension at the top of the 5.00-kg block?
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