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A body whose momentum is constant must have constant

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Important Questions on Laws of Motion

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 47
A rocket with a lift-off mass 3.5×104 kg is blasted upwards with an initial acceleration of 10 m s-2. Then the initial thrust of the blast is
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 48
A body of mass 1 kg moving with a uniform velocity of 1 m s-1. If the value of g is 5 m s-2, then the force acting on the frictionless horizontal surface on which the body is moving is
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 49
A molecule of mass m of an ideal gas collides with the wall of a vessel with a velocity v and returns back with the same speed. The change in linear momentum of molecule is:
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 50

The variation of momentum with the time of one of the bodies in a two-body collision is shown in figure. The instantaneous force is maximum corresponding to point:

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 51
A tennis ball of mass m strikes a wall with a velocity v and retraces the same path. Calculate the change in momentum.
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 52
A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in a elevator moving with an acceleration downwards, the spring length
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 53
A fully loaded elevator has a mass of 6000 kg. The tension in the cable as the elevator is accelerated downward with an acceleration of 2 m s-2 is (Take g=10 m s-2)
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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 54
Newton's second law of motion connects