Rotational Motion (BITSAT Physics): Questions 1 - 4 of 4

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Question number: 1

» Rotational Motion » Radius of Gyration

MCQ▾

Question

The radius of gyration of a disc of mass 50g and radius 2.5cm about an axis passing through its centre of gravity and perpendicular to the plane is –

Choices

Choice (4) Response
a.

1.76cm

b.

0.52cm

c.

6.54cm

d.

3.54cm

Question number: 2

» Rotational Motion » Moment of Inertia

MCQ▾

Question

A cylinder of 500g and radius 10cm has moment of inertia is (about its natural axis) –

Choices

Choice (4) Response
a.

5×103kgm2

b.

2×103kgm2

c.

2.5×103kgm2

d.

3.5kgm2

Question number: 3

» Rotational Motion » Angular Momentum

MCQ▾

Question

A satellite of mass m is circulating around the earth with constant angular velocity. If the radius of the orbit is Ro and mass of the earth is M. The angular momentum about the centre of the earth is –

Choices

Choice (4) Response
a.

MGMRo

b.

MgmRo

c.

MGMRo

d.

mGMRo

Question number: 4

» Rotational Motion » Torque

MCQ▾

Question

The earth of mass 6×1024kg revolves around the sun with an angular velocity of 2×107radsec . In a circular orbit radius 1.5×108km . The force exerted by the sun, on the earth is

Choices

Choice (4) Response
a.

36×1021N

b.

18×1025N

c.

6×1019N

d.

27×1039N

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