Use conservation of momentum to get initial speed of bullet/block system
(m+M)V = m v so V =mv/(m+M)
calculate (1/2) (m+M) V^2
then (m+M) g h = (1/2) (m+M)V^2
calculate V then go back to v = (m+M)V/m
A bullet of mass m= 2.50×10-2kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.60kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.45m before stopping. Calculate the speed of the bullet just before it hits the wood.
1 answer
1 answer