Define: explain why a runner presses the ground with his feet before he starts his run
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Runner press the ground before start running because because when it apply force on the ground then ground will also exert a force on the foot of that runner means it is based on Newton third law or also because of friction it also move
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Using the Newtons's third law of motion - "For every action there in an equal and opposite reaction". The runner presses the ground with his feet before he starts his run in turn the ground deploy a reaction force on the runner in the forward direction to help him run.
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