A constant external torque τ τ acts for a very brief period…

Physics System of Particles Rotational Motion Mix MCQ (Single Correct)

A constant external torque τ τ acts for a very brief period Δ Δ t on a rotating system having moment of inertia I.

The angular momentum of the system will change by Δ Δ t.

The angular velocity of the system will change by

If the system was initially at rest, it will acquire rotational kinetic energy

The kinetic energy of the system will change by

Text Solution

Verified by Experts

The correct answer is:

CHECK THE SOLUTION.

(a, b, c)

Let L = angular momentum.

τ τ = or dL = τ τ dt.

For constant torque,

Δ Δ L = τ τ Δ Δ t = I Δ Δ ω ω or I ω ω if ω ω i = 0

Rotational kinetic energy =

Get practice questions, solutions, and test series in one place.

Share your experience with this question and solution.

Send your comment, doubt, correction, or feedback to admin.

What students say about this solution

No reviews yet. Be the first to write a review.