Suppose you have a 120-kg wooden crate resting on a wood floor (μs = 0.5, μk = 0.3). You push the crate to the right.
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Question 1
1.
Draw a free body diagram for the crate.
Question 2
2.
What maximum force can you exert horizontally on the crate without moving it?
Question 3
3.
If you continue to exert this force once the crate starts to slip, what will its acceleration then be?
A block whose weight is 45.0 N rests on a horizontal table. A horizontal force of 36.0 N is applied to the block. The coefficients of static and kinetic friction are 0.650 and 0.420, respectively.
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Question 4
4.
Draw a free body diagram for the block.
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Question 5
5.
Will the block move under the influence of the force, and, if so, what will be the block's acceleration?
An 81-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is 0.49.
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Question 6
6.
Draw a free body diagram of the baseball player
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Question 7
7.
What is the magnitude of the frictional force?
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A cup of hot chocolate is sitting on the dashboard of a car that is traveling at a constant velocity. The coefficient of static friction between the cup and the dashboard is 0.30. Suddenly, the car accelerates.
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Question 9
9.
Draw the free body diagram of the coffee cup
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Question 10
10.
What is the maximum acceleration that the car can have without the cup sliding backward off the dashboard?
Question 8
8.
If the player comes to rest after 1.6 s, what was his initial velocity?
