Q24 of 124 Page 74

Explain why, a runner presses the ground with his feet before he starts his run.

According to Newton's third law of motion to every action there is an equal and opposite reaction. When runners push the ground the ground also push the runner with an equal and opposite force which he utilizes to run fast. Runners push the ground so he can gain more reaction force from ground. The harder the runner pushes the ground, the more force he can gain to move forward.


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