Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 10

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An angular impulse of $20 N m s$ is applied to a hollow cylinder of mass $2 kg$ and radius $20 cm$ . The change in its angular speed is:

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Important Questions on System of Particles and Rotational Motion

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 11

A hollow sphere of mass

1 kg

and radius

10 cm

is free to rotate about its diameter. If a force of

30 N

is applied tangentially to it, its angular acceleration is

(in rad s^{- 2})

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 12

Two equal and opposite forces are applied tangentially to a uniform disc of mass $M$ and radius $R$ as shown in the figure. If the disc is pivoted at its centre and free to rotate in its plane, the angular acceleration of the disc is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 13

A wheel having moment of inertia

4 kg m^{2}

about its symmetrical axis, rotates at rate of

240 rpm

about it. The torque which can stop the rotation of the wheel in one minute is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 14

A force

\vec{F} = (2 \hat{i} + 3 \hat{j} - 5 \hat{k}) N

acts at a point

{\vec{r}}_{1} = (2 \hat{i} + 4 \hat{j} + 7 \hat{k}) m .

The torque of the force about the point

{\vec{r}}_{2} = (\hat{i} + 2 \hat{j} + 3 \hat{k}) m

is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 15

A particle of mass $m$ is moving with constant velocity $v$ parallel to the $x$ -axis as shown in the figure. Its angular momentum about origin $O$ is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 16

A particle of mass

m = 5

units is moving with a uniform speed

v = 3 \sqrt{2} m / s

in the

X O Y

plane along the line

Y = X + 4

. The magnitude of the angular momentum about origin is :

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 17

A particle $P$ is moving along a straight line as shown in the figure. During the motion of the particle from $A$ to $B$ the angular momentum of the particle about $O$

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>Assignment>Q 18

For equilibrium of the system, value of mass $m$ should be

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