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IMPORTANT
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Internal forces can change
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Important Questions on Centre of Mass, Linear Momentum, Collision
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JEE Main
IMPORTANT
A bullet hits a block kept at rest on a smooth horizontal surface and gets embedded into it. Which of the following does not change?
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JEE Main
IMPORTANT
A uniform sphere is placed on a smooth horizontal surface and a horizontal force is applied on it at a distance above the surface. The acceleration of the centre
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JEE Main
IMPORTANT
A body falling vertically downwards under gravity breaks in two parts of unequal masses. The centre of mass of the two parts taken together shifts horizontally towards
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JEE Main
IMPORTANT
A ball kept in a closed box moves in the box making collisions with the walls. The box is kept on a smooth surface. The velocity of the centre of mass
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IMPORTANT
A body at rest breaks in to two pieces of equal masses. The parts will move
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JEE Main
IMPORTANT
A heavy ring of mass is clamped on the periphery of a light circular disc. A small particle having equal mass is clamped at the centre of the disc. The system is rotated in such a way that the centre moves in a circle of the radius with a uniform speed . We conclude that an external force
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JEE Main
IMPORTANT
The quantities remaining constant in a collision are
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JEE Main
IMPORTANT
A nucleus moving with a velocity emits a particle. Let the velocities of the particle and the remaining nucleus are and and their masses be and , then
