Question
If applied torque on a system is zero, i.e.,Τ = 0 , then for that system
ω = 0
α = 0
J = 0
F = 0
Solution
B.
α = 0
τ the torque on a given axis is product of moment of inertia and angular acceleration.
I = moment of inertia
α = angular acceleration
If
But I ≠ 0
α = 0
When the torque acting upon a system is zero, the angular momentum is constant and hence conserved. This is analogous to the linear counterpart i.e when the force on the system is zero, the momentum is conserved.
