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Assertion(A) In an elastic collision of two billiard balls, the total KE is conserved during the short time of collision of the balls
(i.e., when they are in contact).Reason(R) Energy spent against friction does not follow the law of conservation of energy.
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(i.e., when they are in contact).Reason(R) Energy spent against friction does not follow the law of conservation of energy.
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Verified Answer
The correct answer is:
Both A and R is false.
In an elastic collision of two billiard balls, there is deformation in shape of balls momentarily. During the collision potential energy
increases due to deformation of balls and kinetic energy decreases. Hence, total energy remains constant but kinetic energy is not conserved.
Law of conservation of energy always applies, in
every case.
Thus, both Assertion and Reason are false.
increases due to deformation of balls and kinetic energy decreases. Hence, total energy remains constant but kinetic energy is not conserved.
Law of conservation of energy always applies, in
every case.
Thus, both Assertion and Reason are false.
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