Question

When a person runs he presses the ground with his feet why

Answer 1

its because of the weight of a man which makes him to press the ground with his feet

Answer 2

According to newtons third law of motion.
"For every action there will be equal and opposite reaction.
When the runner pushes the ground he experiences an equal and opposite reaction from the ground. Which is utilized by him to run. faster.
The harder he pushes the ground, the more force he gains and runs fast.
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