A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to

Last updated: 7/31/2022

A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 4.70 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. (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.