Engineering Mechanics
Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

(2/3) Ml²
(1/12) Ml²
(1/3) Ml²
(3/4) Ml²

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Engineering Mechanics
One joule means that

Work is done by a force of 1 g when it displaces a body through 1 cm
Work is done by a force of 1 dyne when it displaces a body through 1 cm
Work is done by a force of 1 N when it displaces a body through 1 m
Work is done by a force of 1 kg when it displaces a body through 1 m

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Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Both the balls undergo an equal change in momentum
The change in momentum suffered by rubber ball is more than the lead ball
The change in momentum suffered by rubber ball is less than the lead ball
None of these

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