Question

A bullet of mass 12 g is fired horizontally into a fixed wooden block with a speed of 20m/s. The bullet is brought to rest in the block in 0.1 seconds by a costant resistance. Calculate the
(i) magnitude of the resistance
(ii) distance moved by the bullet in the wood.

Answer 1

impulse=changemomentum
force*.1=.012*20
solve for resistance force.

distance: average velocity is 10m/s, in .1 sec
distance=avgvelociyt*time=1meter

Answer 2

great! Thank you bobpursley

Answer 3

Sorry to ask 20 x0.1 is it not 2