You throw a 4kg rock directly down at 6m/s from the top of a 18m cliff

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Question description

 Calculate the: a) initial potential energy of the rock b) initial kinetic energy of the rock c) speed of the rock when it is 13m above the ground (fell 5m) d) speed the rock will hit the ground e) distance the rock is driven into the mud if the mud exerts a steady upwards force of 4000N f) speed the rock hits the ground if the rock is initially thrown upwards at 6m/s

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(Top Tutor) Daniel C.
School: UCLA
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