Question

How does torque affect rotational motion?

Answer 1

Torque produces angular acceleration in rotational motion.

Explanation:

Torque plays the same role in rotational motion that force plays in linear motion. Through Newton'a Second Law you know that force `F` acting on a body of mass `m` produces (linear) acceleration `a` according to:
`F=ma`
In the same way a net torque `tau` acting on a body of moment of inertia `I` causes it to undergo the angular acceleration `alpha` as:
`tau=Ialpha`