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A machine gun fires shoot per minute. If the mass of each bullet is and the muzzle velocity is , the average recoil force on the machine gun 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

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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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