A 20-kg rock that is initially at rest loses 407j of
A 2.0-kg rock that is initially at rest loses 407J of potential energy while falling to the ground. Calculate the kinetic energy that the rock gains while falling. What is the rock's speed just before it strikes the ground?
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a 20-kg rock that is initially at rest loses 407j of potential energy while falling to the ground calculate the kinetic
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