Question

a) According to law of inertia no force is required to maintain motion if object is already
in motion then why we have to keep peddling a bicycle to maintain motion.​

Answer 1

Answer:

The cause of the need to keep pedaling is friction.

Explanation:

Stated more completely, the law of inertia states that no force is required to maintain motion unless acted on by an outside force.

Friction is an outside force. Unfortunately, friction is pretty much inescapable in the real world.

I hope this helps,