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Assertion: A quick collision between two...

Assertion: A quick collision between two bodies is more violent that show collision , even when initial and final velocity are identical.
Reason: The rate of change of momentum determine that force is small or large.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If asserti on is true but reason is false

D

If the assertion and reason both are false

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The correct Answer is:
A
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Assertion : In case of elastic collision between two objects , speed of approach is same as speed of separation . Reason : In case of elastic collision between two objects , linear momentum of the system remains conserved .

Assertion: In a elastic collision (e = 1) between two bodies, conservation of kinetic energy holds true. i.e., (K_(1) + K_(2))_(i) = (K_(1) + K_(2))_(f) . Reason: Conservation of momentum holds true i.e., (P_(1) + P_(2))_(i) = (P_(1) + P_(2))_(f) .

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Underline the correct alterntaive: a) when a conservative force does positivie work on a body, the potential energy of the body increase/decreases/remains unaltered. work done by a body against friction always results in a loss of its kinetic /potential energy. c) The rate of change of total momentum of a many-particle system is proportional to the external force/ sum of the internal forces on the system. d) In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/total linear momentum/total enregy of the system of two bodies.

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