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

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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 31
Two discs having masses in the ratio 1: 2 and radii in the ratio 1: 8 roll down without slipping one by one from an inclined plane of height h. The ratio of their linear velocities on reaching the ground is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 32
Which of the following (if mass and radius are assumed to be same) have maximum percentage of total K.E. in rotational form while pure rolling?
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 33
A solid cylinder of mass M and radius R rolls down an inclined plane of height h. The angular velocity of the cylinder when it reaches the bottom of the plane is:
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 34
If radius of earth becomes n times its present value, without change in mass, then duration of day becomes
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 35
Due to global warming, ice on polar caps is likely to melt in larger quantity. Due to this effect
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 36
Fly-wheel is used with an engine because it
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 37
Different minerals are being mined from within the earth and multi-storeyed complexes are being constructed. Due to this activity theoretically
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 39
A solid sphere of diameter 0.1 m and mass 5 kg is rolling down an inclined plane with a speed of 4 m s-1. The total kinetic energy of the sphere is