Atwood Machines - Mr. Britton / FHS Physics

CHAPTER 5: Force and Newton's Laws of Motion ( I )
5.4 — Assignment
AP Physics
Name:
Hour:
Atwood Machines
Date Ass’d:
____
/ 10
For the following problems, refer to the diagram below, which shows a device invented in the late 1700s by George
Atwood. It was a simple device, but an excellent tool for testing and verifying Newton's laws, particularly Newton's
second law of motion.
1.
If m1 = 10 kg and m2 = 15 kg
(a)
Draw a free body diagram for each mass, labeling each force.
(b)
Find the magnitude and direction of the acceleration of both masses.
(c)
Find the tension in the rope.
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CHAPTER 5: Force and Newton's Laws of Motion ( I )
5.4 — Assignment
AP Physics
2.
3.
Name:
Hour:
If m1 = 10 kg and m2 = 30 kg
(a)
Draw a free body diagram for each mass, labeling each force.
(b)
Find the magnitude and direction of the acceleration of both masses.
(c)
Find the tension in the rope.
If m1 = 10 kg and m2 = 100 kg
(a)
Draw a free body diagram for each mass, labeling each force.
(b)
Find the magnitude and direction of the acceleration of both masses.
(c)
Find the tension in the rope.
2 of 3
Date Ass’d:
CHAPTER 5: Force and Newton's Laws of Motion ( I )
5.4 — Assignment
AP Physics
4.
Name:
Hour:
Date Ass’d:
If m1 = 10 kg and m2 = 10 kg
(a)
Draw a free body diagram for each mass, labeling each force.
(b)
Find the magnitude and direction of the acceleration of both masses.
(c)
Find the tension in the rope.
5.
Suppose the tension in the rope is 75 N, and m1 is accelerating upwards at 2.3 m/s2 . What is m1 and m2 ?
6.
A house painter uses the chair and pulley arrangement of the figure to lift himself up the side of a house. The
painter's mass is 70 kg and the chair's mass is 10 kg. With what force must he pull down on the rope in order to
(a)
remain at rest?
(b)
accelerate upward at 0.20 m/s2?
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