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A wheel of moment of inertia of $5 \times 10^{- 3} kg m^{2}$ is making $20 rev s^{- 1} .$ The torque required to stop it in $10 s$ is

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Important Questions on Rotational Motion

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 20

0.16 kg m^{2}

rotates at

240 rpm

about a vertical axis. The angular speed of the wheel, when a torque of

- 0.81 N m

is applied about the same axis for

2.0 s

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 21

An automobile engine develops

100 kW

when rotating at a speed of

1800 rev \min^{- 1}

. The torque delivered by the engine is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 22

The radius of gyration of a flywheel is

(\frac{3}{π}) m

and its mass is

1 kg

. The speed of the flywheel is changed from

20 r . p . m

60 r . p . m

The work required to be done is

HARD

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 23

A loop and a disc have the same mass and roll without slipping with the same linear velocity

v

. If the total kinetic energy of the loop is

8 J

, the kinetic energy of the disc must be

HARD

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 24

A body of radius

R

and mass

m

is rolling smoothly with speed

v

on a horizontal surface. It then rolls up a hill to a maximum height h. If

h = \frac{3 v^{2}}{4 g},

then the body can be of which of the following types?

HARD

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 25

A ring of mass

0 \cdot 3 kg

and radius

0 \cdot 1 m

and a solid cylinder of mass

0 \cdot 4 kg

and of the same radius are given the same kinetic energy and released simultaneously on a flat horizontal surface. They begin to roll as soon as released towards a wall which is at the same distance from the ring and cylinder. Which will reach the wall first?

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 26

If a spherical solid ball rolls on a table without slipping, then the fraction of its total energy associated with rotation is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Rotational Motion>Critical Thinking>Q 27

Total kinetic energy of a rolling solid sphere is (

M

is mass and

v

is velocity)

A wheel of moment of inertia of 5×10-3 kg m2 is making 20 rev s-1. The torque required to stop it in 10 s is

Important Questions on Rotational Motion

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A wheel of moment of inertia of $5 \times 10^{- 3} kg m^{2}$ is making $20 rev s^{- 1} .$ The torque required to stop it in $10 s$ is