A 20-kg rock initially at rest loses 407 j of potential
A 2.0-kg rock initially at rest loses 407 J of potential energy while falling to the ground.
1. Compute the kinetic energy that the rock gains while falling.
2. What is the rock’s speed just before it strikes the ground?
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a 20-kg rock initially at rest loses 407 j of potential energy while falling to the ground1 compute the kinetic energy
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