A 780 gram bullet moving at 620 ms penetrates a tree trunk, Physics

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A 780 gram bullet moving at 620 ms penetrates a tree trunk

A 7.80 gram bullet moving at 620 m/s penetrates a tree trunk to a depth of 6.5 centimeter.

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

(b) Suppose the friction force is constant, calculate 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 620 ms penetrates a tree trunk

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Physics: A 780 gram bullet moving at 620 ms penetrates a tree trunk

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