If applied torque on a system is zero, i.e., ( \tau =0 ) , t... | Physics | SolveeIt | Solveeit

Today, August 24

Question

If applied torque on a system is zero, i.e., $\tau =0$ , then for that system:

A

$\omega =0$

B

$\alpha =0$

C

$J=0$

D

$F=0$

Answer

$\alpha =0$

Explanation

Solution

$\tau=I \alpha$ (where $\tau=$ torque ) $I=$ moment of inertia $\alpha=$ angular acceleration if $\tau=0$ $I \alpha=0$ But $I \neq 0$ $\therefore \alpha=0$