HARD
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A ball of mass m is thrown upwards with a velocity v. If air exerts an averages resisting force F, the velocity with which the ball returns to the thrower is
(a)
(b)
(c)
(d)

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Important Questions on Laws of Motion
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[Young's modulus for copper and steel are and respectively]


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(density of water is )



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A block of mass rests on another block of mass and is tied to a wall as shown in the figure. The coefficient of friction between and is and that between and ground is . The minimum force required to move the block is

EASY
A particle moving with velocity is acted by three forces shown by the vector triangle . The velocity of the particle will

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