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A person of mass is standing on one end of a plank of mass and length and floating in water. The person moves from one end to another and stops. The displacement of the plank is -
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Important Questions on Centre of Mass, Momentum and Collisions
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If increases by . Then momentum will increase by:-
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K.E. body is increased by . Then, the percentage change in is,
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Two particles of masses and have same momentum. Calculate the ratio of their K.E.
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If the kinetic energy of a body is double of its initial kinetic energy, then the momentum of the body will be:
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If the kinetic energy is increased by , the momentum will increase by:-
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If the kinetic energy of a body increases by the momentum
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A projectile is fired at with momentum , neglecting friction, the change in kinetic energy, when it returns to the ground, will be:-
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Three identical spheres each of mass are placed touching one another with their centres in a straight line. Their centres are marked as respectively. The distance of centre of mass of the system from is
