Unless otherwise stated, all objects are located near the Earth\'s surface, wher

Question

Unless otherwise stated, all objects are located near the Earth's surface, where g = 9.80 m/s 2 .
A sprinter of mass 61.9kg starts his race by pushing horizontally backward on the starting blocks with a force of 240N .

Part A

What force causes him to accelerate out of the blocks? chooes one

his push on the blocks (    )

Part B

Determine his initial acceleration as he leaves the blocks.

his push on the blocks (    )

Part B

Determine his initial acceleration as he leaves the blocks.

Explanation / Answer

PART-1

Answer-the force the blocks exert forward on him

explaination

If the force is on the blocks it will not accelerate the sprinter. However there will be a reaction force back on the runner from the blocks that can push the sprinter.

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PART-B

F=m*a

240=61.9*a

a=240/61.9

a=3.877m/sec^2

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