I have a problem r my physics class: A rifle with a barrel length of 58cm fires a 9g bullet with a horizontal speed of 450m/s .

I have a problem r my physics class:A rifle with a barrel length of 58cm  fires a 9g  bullet with a horizontal speed of 450m/s . The bullet strikes a block of wood and penetrates to a depth of 1 cm5 What resistive force (assumed to be constant) does the wood exert on the bullet? How long does it take the bullet to come to rest?