A 780 gram bullet moving at 460 ms penetrates a tree trunk


A 7.80 gram bullet moving at 460 m/s penetrates a tree trunk to a depth of 4.4 centimeter.

(a) Use work and energy considerations to determine the average frictional force that stops the bullet.

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(b) Suppose the friction force is constant, find how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

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Physics: A 780 gram bullet moving at 460 ms penetrates a tree trunk
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