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A machine gun fires a bullet of mass with a velocity . The man holding it can exert a maximum force of on the gun. How many bullets can be fired per second?
(a)Only one
(b)Three
(c)Can fire any number of bullets
(d)

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Important Questions on Laws of Motion
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A machine gun has a mass . It fires bullets at the rate of bullets per minute at a speed of . What force is required to keep the gun in position?

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Starting from rest, a body slides down a inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is:

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A particle of mass is moving with velocity , it is given an impulse such that the velocity becomes . Then magnitude of impulse is equal to

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A force of acts on a body of mass for seconds. Change in its momentum is

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A ice skater, initially at rest, throws a snowball with a speed of . What is the approximate recoil speed of the skater?

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A rifleman, who together with his rifle has a mass of stands on a smooth surface and fires shots horizontally. Each bullet has a mass and a muzzle velocity of . The velocity which the rifleman attains after firing shots is

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A body of mass is placed on a horizontal surface having kinetic friction and static friction . If the force applied on the body is , then the frictional force acting on the body will be

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A bag of sand of mass is suspended by a rope. A bullet of mass is fired at it with a velocity and gets embedded into it. The velocity of the bag finally is
