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A rifle with a barrel length of 59 cm fires a 9 g bullet with a...

A rifle with a barrel length of 59 cm fires a 9 g bullet with a horizontal speed of 420 m/s . The bullet strikes a block of wood and penetrates to a depth of 13 cm .What resistive force (assumed to be constant) does the wood exert on the bullet? ( I got 6100 N but I am not sure if this is correct). How long does it take the bullet to come to rest after entering the wood?

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