Question

Why with rotation of one gear other gear also rotates?​

Answer 1

Answer:

Gears are usually found in sets of two or more, used to transmit rotation from the axis of one gear to the axis of another. The teeth of a gear one one axis mesh with the teeth of a gear on another, thus creating a relationship between the rotation of the two axes. When one axis is spun, the other will too.

Answer 2

Explanation:

When two gear are placed next to each other such that teeth mesh,turning of one gear causes the other gear to turn.In this way ,gears transfer force . because two gears that touch each other always rotate in opposite direction,gears also change the direction of that force.

I hope it will help you