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Friction: Box in a truck

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Consider a box in back of a pickup truck.

1. If the truck accelerates slowly, the box moves with the truck without slipping. What force or forces act on the box to accelerate it? In what direction do these forces point?

2. Draw a free body diagram of the box

3. What happens to the box if the truck accelerates too rapidly? Explain why this happens, basing your explanation on physical models.

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Solution Summary

Friction force on a box in a truck moving with different accelerations.

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