Multiple choice

When two balls of same temperature collide, which of the following remains conserved?

  1. Temperature

  2. Velocity

  3. Linear momentum

  4. Kinetic energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Linear momentum is always conserved in any collision (elastic or inelastic) when no external forces act. Temperature remaining the same is a condition stated in the problem, not a conserved quantity. Velocity and kinetic energy are NOT conserved - in inelastic collisions, kinetic energy is lost to deformation/heat, and velocities of individual balls change.

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