1. Tardigrade
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  3. Physics
  4. The diagram to the right shows the velocity-time graph for two masses R and S that collided elastically. Which of the following statements is true? (I) R and S moved in the same direction after the collision. (II) Kinetic energy of the system (R S) is minimum at t=2 milli sec. (III) The mass of R was greater than mass of S.

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Q. The diagram to the right shows the velocity-time graph for two masses $R$ and $S$ that collided elastically. Which of the following statements is true?
(I) $R$ and $S$ moved in the same direction after the collision.
(II) Kinetic energy of the system $(R \,\&\, S)$ is minimum at $t=2$ milli sec.
(III) The mass of $R$ was greater than mass of $S$.Physics Question Image

Laws of Motion

Solution:

(i) From graph final velocity of both body is positive.
(ii) $K.E. $ is minimum when velocity of each body becomes equal.
(iii) Magnitude of change in velocity of $R$ is less.