Rotational Motion (AIIMS Physics): Questions 13 - 16 of 16

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Question number: 13

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A stone tied to the end of 15 cm long string is whirled in a horizontal circle. If the centripetal acceleration is 9.6ms2 , its angular speed in radians is –

Choices

Choice (4) Response

a.

227

b.

8

c.

9

d.

15

Question number: 14

» Rotational Motion » Conservation of Angular Momentum

Appeared in Year: 2005

MCQ▾

Question

Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momentum will be in the ratio – [AIPMT]

Choices

Choice (4) Response

a.

2:1

b.

1:2

c.

2:1

d.

1:2

Question number: 15

» Rotational Motion » Moment of Inertia

Appeared in Year: 2004

MCQ▾

Question

A round disc of moment of inertia 150kgm2 about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia 100kgm2 rotating with an angular velocity 50rads about the same axis. The final angular velocity of the combination of discs is –

[AIPMT]

Choices

Choice (4) Response

a.

50rads

b.

40rads

c.

30rads

d.

60rads

Question number: 16

» Rotational Motion » Conservation of Angular Momentum

MCQ▾

Question

A rotating platform of moment of inertia 120kgm2 completes one rotation in 20 seconds. A person of mass 80kg is standing at the centre of platform. If the person moves at a distance of 1m from the centre along the radius then find the angular velocity of the platform.

Choices

Choice (4) Response

a.

π200rads

b.

3π50rads

c.

π50rads

d.

3π200rads

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