Blocks A and B are on a frictionless horizontal surface. Block A
is to the left of block B. Block A has a mass of 2.5 kg and B has a
mass of 1.3 kg. Block A is struck from the left with a hammer. The
average force of this impact is 65 N and lasts for 0.12 seconds.
Block A slides to the right, strikes and sticks to block B. The two
blocks then slide to the right together. They then reach a rough
surface which has a coefficient of kinetic friction of 0.31.
Using impulse and momentum, determine the speed of block A after
the hammer strikes it.
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