Student Login

Home›Chapters›Rotational Motion PYQs›Rotational Kinetic Energy, Work & Power›Question 6

MHT CET 2026 (18 Apr, Shift 1) · Rotational Kinetic Energy, Work & Power

Rotational Kinetic Energy, Work & Power question from MHT CET 2026 (18 Apr, Shift 1)

Q6MHT CET 2026 · 18 APR · SHIFT 1Medium

Rotational Kinetic Energy, Work & Power

The angular momentum of a rotating body is 'L'. When the frequency of rotating body is tripled and its kinetic energy is made one-third, the new angular momentum becomes

Show answer and solution

Answer: (d)

$K = \frac{1}{2}L\omega \Rightarrow L = \frac{2K}{\omega}$
$\omega' = 3\omega$ , $K' = \frac{K}{3}$ : $L' = \frac{2K/3}{3\omega} = \frac{L}{9}$
So the answer is (d) $\frac{L}{9}$ .

Report a mistake

More questions on Rotational Kinetic Energy, Work & Power

Two bodies A and B have moment of inertia IA and IB, and angular momenta LA and LB…MHT CET 2026 (17 Apr, Shift 1)
If the earth suddenly contracts to (1/3)rd of its present size without change in its…MHT CET 2026 (15 Apr, Shift 1)
A uniform rod of length l is free to rotate in a vertical plane about a fixed horizontal…MHT CET 2026 (19 May, Shift 2)
A thin uniform rod of length L and mass m is swinging freely about a horizontal axis…MHT CET 2026 (15 May, Shift 1)
A thin uniform rod AB of mass ' m ' and length ' l ' is hinged at one end A to the ground…MHT CET 2026 (19 Apr, Shift 1)
A thin uniform rod (X) of mass M and length L is pivoted at a height (L/3) as shown in…JEE Main 2026 (24 Jan, Shift 2)
A body is rotating about its own axis. Its rotational kinetic energy is ' x ' and its…MHT CET 2025 (21 Apr, Shift 2)
The angular momentum of a rotating body is ' L '. When the frequency of rotating body is…MHT CET 2025 (5 May, Shift 2)