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Physics Test 186
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  • Question 1/10
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    A circular disc A of radius r is made from an iron plate of thickness t, and another circular disc B of radius 4r is made from an iron plate of thickness t/4. The relation between the moments of inertia IA and IB is

  • Question 2/10
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    A solid homogeneous sphere is moving on a rough horizontal surface, partly rolling and partly sliding. During this kind of motion of the sphere

  • Question 3/10
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    A sphere of mass m and radius r rolls on a horizontal plane without slipping with the speed u. Now, if it rolls up vertically, the maximum height it would attain will be

  • Question 4/10
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    The wheels on the old-time bicycle shown in the diagram have radii of 60.0 cm. and 10.0 cm. If the larger wheel is rotating at 12.0 rad s-1, what is the angular speed of the smaller wheel?

  • Question 5/10
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    Angular momentum is conserved

  • Question 6/10
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    If the earth shrinks such that its mass does not change but radius decreases to one-quarter of its original value then one complete day will take

  • Question 7/10
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    A solid sphere rolls down two different inclined planes of same height, but of different inclinations. In both cases,

  • Question 8/10
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    The angular speed of rotating rigid body is increased from 4ω to 5ω keeping moment of inertia constant. The percentage increase in its K.E is -

  • Question 9/10
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    The radius of a solid sphere is R and its density D. When it is made to rotate about an axis passing through any diameter of sphere, expression for its moment of inertia is

  • Question 10/10
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    The equation τ = Iα is valid about which of the following?

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