Rotational Motion-Rotational Kinetic Energy (NEET Physics): Questions 1 - 5 of 6

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Question number: 1

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

Two disc, each having moment of inertia 5 kg m 2 about its central axis, rotating with speeds 10 rad s -1 and 20 rad s -1, are brought in contact face with their axes of the rotation coincided. The loss of kinetic energy in the process is,

Choices

Choice (4) Response

a.

125 J

b.

5 J

c.

0 J

d.

2 J

Question number: 2

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

A sphere is rolling without slipping on a horizontal plane. The ratio of its rotational kinetic energy and translation kinetic energy is,

Choices

Choice (4) Response

a.

2: 9

b.

2: 3

c.

2: 5

d.

2: 7

Question number: 3

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

A body is rolling down an inclined plane. Its translational and rotational kinetic energies are equal. The body is not a,

(1) Solid sphere

(2) Hollow sphere

(3) Solid cylinder

(4) Hollow cylinder

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

Question number: 4

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

The moment of a uniform disc about an axis, perpendicular to the disc, at the centre is 12MR2 (M = mass, R = radius of disc). If the disc is rolling on its edge without slipping on a straight line path, the ratio of rotation kinetic energy to translation one is,

Choices

Choice (4) Response

a.

1

b.

18

c.

14

d.

12

Question number: 5

» Rotational Motion » Rotational Kinetic Energy

Appeared in Year: 2016

MCQ▾

Question

Two rotating bodies A and B of masses m and 2m with moments of inertia IA and IB(IB>IA) , have equal kinetic energy of rotation. If LA and LB be their angular momenta respectively, then –

Choices

Choice (4) Response

a.

LA>LB

b.

LA=2LB

c.

LA=LB2

d.

LB>LA

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