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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 Balls (I.E. When They Are in Contact) - CBSE (Science) Class 11 - Physics

ConceptWork Done by a Constant Force and a Variable Force

#### Question

In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the balls (i.e. when they are in contact)?

#### Solution 1

In this case total kinetic energy is not conserved because when the bodies are in contact dining elastic collision even, the kinetic energy is converted into potential energy

#### Solution 2

No, In an elastic collision, the total initial kinetic energy of the balls will be equal to the total final kinetic energy of the balls. This kinetic energy is not conserved at the instant the two balls are in contact with each other. In fact, at the time of collision, the kinetic energy of the balls will get converted into potential energy.

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#### APPEARS IN

NCERT Solution for Physics Textbook for Class 11 (2018 to Current)
Chapter 6: Work, Energy and Power
Q: 8.1 | Page no. 135
Solution In an Elastic Collision of Two Billiard Balls, is the Total Kinetic Energy Conserved During the Short Time of Collision of the Balls (I.E. When They Are in Contact) Concept: Work Done by a Constant Force and a Variable Force.
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