MHT-CET

System of Particles and Rotational Motion question bank (Physics)

Practice 275 free MHT-CET Physics - System of Particles and Rotational Motion questions with answers and step-by-step solutions.

Start free Book a demo

All Easy Hard Medium

Q1.

If the earth suddenly contracts to $(1/3)^{rd}$ of its present size without any change in its mass, the ratio of the kinetic energy of the earth after and before contraction will be (Earth is assumed to be a rotating sphere about itself).

(A)

$9$

(B)

$1/9$

(C)

$3$

(D)

$1/3$

Show answer & solution

Verified Answer & Solution Locked

Q2.

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

(A)

$L/9$

(B)

$L/3$

(C)

$L$

(D)

$3L$

Show answer & solution

Verified Answer & Solution Locked

Protected Questions

Unlock All 68 Questions in System of Particles and Rotational Motion

Log in or sign up free to access every question with complete solutions, create chapter practice tests, and track your performance.

Sign up free to access all 68 questions

Unlock every System of Particles and Rotational Motion question, generate papers, and practice at your own pace.

Start free