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Assertion : In an elastic collision of ...

Assertion : In an elastic collision of two billiard balls, the total knetic energy is conserved during the short time of oscillation of the balls ( i.e. when they are in contact ) .
Reason : Energy spent against friction does not follow the law of conservation of energy .

A

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

B

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

C

If the assertion is true but the reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
The billiard balls in an elastic collision are in a deformed state. And their total energy is in the form of P.E. and K.E. Thus K.E. is less than the total energy . The energy spend against friction is dissipated in the form of heat which is not available for doing work.
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In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the ball (i.e when they are in contact)?

Assertion: In an elasticcollision of two billard balls, the total KE is conservation during the short times of collision of the balls (i.e., when they are in constant). Reason: Energy spend against friction does not follow the law of conservation of energy.

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During elastic collision of two balls, is kinetic energy conserved during the short interval of contact of balls ?

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