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Free Online Mock Physics Multiple Choice Test on Rotational Motion

Sub Category : Rotational Motion

Test : 25

Time Left :

1)	A ring of radius 0.5m and mass 10 kg is rotating about its diameter with angular velocity of 20 rad/sec. Its kinetic energy is (1) 10J (2) 100J (3) 500J (4) 250J
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2)	Two discs of same material and thickness have radii 0.2m and 0.6m. Their moments of inertia about their axes will be in the ratio (1) 1:81 (2) 1:27 (3) 1:9 (4) 1:3
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3)
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4)	A circular disc of radius R and thickness R/6 has moment of inertia I about an axis passing through its centre and perpendicular to its plane. It is method and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is (1) I (2) 2I/5 (3) I/5 (4) I/10
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5)	A meter stick of mass 400 g is pivoted at one end and displaced through an angle 60 degree. The increase in its potential energy is (1) 2J (2) 3J (3) oJ (4) 1J
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