Homework Help: Physics

Posted by Jay on Thursday, March 24, 2011 at 6:36pm.

A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 4.8 cm. Assuming the friction force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

Physics - NinaCC, Saturday, February 25, 2012 at 9:58pm
Vo=0
7.80g=.0078kg
V=590m/s
d=.048m

W/d
W=Fd
=1/2mV^2 - 1/2m(Vo)^2
Physics - NinaCC, Saturday, February 25, 2012 at 10:10pm
Forgot to clarify W/d is the total Force. Where W=KE=1/2mV^2

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