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Frictional Force CP

Posljednje ažuriranje almost 2 years ago

10

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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Pitanje 1

1.

Draw a free body diagram for the crate.

Pitanje 2

2.

What maximum force can you exert horizontally on the crate without moving it?

Pitanje 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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Pitanje 4

4.

Draw a free body diagram for the block.

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Pitanje 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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Pitanje 6

6.

Draw a free body diagram of the baseball player

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Pitanje 7

7.

What is the magnitude of the frictional force?

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Pitanje 8

8.

If the player comes to rest after 1.6 s, what was his initial velocity?

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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Pitanje 9

9.

Draw the free body diagram of the coffee cup

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Pitanje 10

10.

What is the maximum acceleration that the car can have without the cup sliding backward off the dashboard?