Why is a large initial force required to accelerate a heavy object?

What was the mistake in Aristotle's idea regarding motion?

$A$ person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing a seat belt,he falls forward and hits his head against the steering wheel. Why?

$A$ man getting down from a running bus falls forward because:

Physical independence of force is a consequence of

An athlete does not come to rest immediately after crossing the winning line due to the