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mugzieee
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Frictional Force, PLEASE HELP!
A rifle with a barrel length of 55.0cm fires a 12.0g bullet with a horizontal speed of 350m/s. The bullet strikes a block of wood and penetrates to a depth of 11.0cm. What frictional force (assumed to be constant) does the wood exert on the bullet?
heres what i do but its wrong:
F_k_=mu_k_*F_n_
A rifle with a barrel length of 55.0cm fires a 12.0g bullet with a horizontal speed of 350m/s. The bullet strikes a block of wood and penetrates to a depth of 11.0cm. What frictional force (assumed to be constant) does the wood exert on the bullet?
heres what i do but its wrong:
F_k_=mu_k_*F_n_