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Consider a rocket is being fired. The kinetic energy of the rocket is increased by 16 times where as its total mass is reduced by half through the burning of fuel. The factor by which its momentum increases is

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Important Questions on Laws of Motion

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A shell of mass, 20 g is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 6 km min-1, what is the recoil speed of the gun?
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The unit of momentum is
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A passenger sitting in a bus moving along a circular path experiences a force which is
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The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is,

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The figure shows the position - time (xt) graph of one-dimensional motion of a body of mass 0.4 kg. The magnitude of each impulse is

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A bullet of 4 g mass is fired from a gun of mass 4 kg. If the bullet moves with the muzzle speed of 50 ms1, the impulse imparted to the gun and velocity of recoil of gun are 
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If a force F=500-100t, then impulse as a function of time will be:-
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A constant force, F=m1g2 is applied on the block of mass m2 as shown in figure. The string and the pulley are light and the surface of the table is smooth. Find the acceleration of m2.

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