Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 22

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Moment of a force of magnitude $20 N$ acting along positive $x$ direction at point $(3 m, 0, 0)$ about the point $(0, 2, 0)$ (in $N - m$ ) 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>EXERCISE>Q 23

A flywheel of moment of inertia

2 kg m^{2}

is rotated at a speed of

30 rad s^{- 1} .

A tangential force at the rim stops the wheel in

15

second. Average torque of the force is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 24

A torque

T

acts on a body of moment of inertia

I

rotating with angular speed

ω .

It will be stopped.just after time,

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 25

A disc is rotating with angular velocity

\vec{ω}

. A force

\vec{F}

acts at a point whose position vector with respect to the axis of rotation is

\vec{r}

. The power associated with the torque due to the force is given by

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 26

A particle is rotating in a circle with uniform speed as shown. The angular momentum of the particle w.r.t. origin is

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 27

When torque applied on a system is zero, which of the following will be constant ?

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 28

A particle is moving along a straight line parallel to $x$ -axis with constant velocity. Find angular momentum about the origin in vector form

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 29

A particle is moving along a straight line with increasing speed. Its angular momentum about a fixed point on this line:

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 30

When a body is spinning on its axis in absence of any external torque, then choose the wrong statement