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A 14 g bullet is ﬁred into a 120 g wooden

block initially at rest on a horizontal surface.
The acceleration of gravity is 9.8 m/s^2
.
After impact, the block slides 6.97 m before coming to rest.If the coeﬃcient of friction between block
and surface is 0.568 , what was the speed of
the bullet immediately before impact?

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