A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 5.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet.  N= (b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.  s=

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Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.3OQ: A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0...
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A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 5.60 cm.

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

(b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
 s=
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