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The 20 kg block is falling and when it is 7.5 m from the gravel surface it has a velocity of 2.5 m/s.
Determine the velocity of the block the instant it hits the gravel surface using
(a) The principle of work and energy
(b) Constant acceleration equations
(c) Determine the impulse of the block on the gravel surface.
Neglect the distance the block indents into the gravel.
Assume the block does not rebound.
Neglect the weight of the block during the impact with the gravel surface.
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