Well depending on the speed of both of those things is were the rock will be placed and it also determines how fast can an environment change
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The answer is: [C]: "elasticity" .
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Depends on how well built he is probably for the average American 8 MPH
Answer:
20.7N
Explanation:
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Potential energy U = mgh
Given h = 123 m,
mg = F = 780 N
Then
U = (123)(780)
= 95940
= 9.59 x 10^4