MHT-CET

Rotational Motion question bank (Physics)

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Q1.

A solid, homogeneous sphere of mass M and radius R is rolling down a rough inclined plane inclined at an angle $\theta$. Which of the following statements is INCORRECT?

(A)
Angular momentum is not conserved about the point of contact.
(B)
The net torque acting on the sphere is $mgR\cos\theta$
(C)
The total energy is conserved.
(D)
The horizontal component of force on the sphere is $mg\sin\theta - f = ma$
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Q2.

Moment of inertia of big drop is $I$. If 8 droplets are formed from big drop, then moment of inertia of small droplet is

(A)
$\frac{I}{32}$
(B)
$\frac{I}{16}$
(C)
$\frac{I}{8}$
(D)
$\frac{I}{4}$
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