The diagram shows the velocity - time graph for two masses R and S that collided head on elastically. Which of the following statements is true?
(i)R and S moved in the same direction after the collision.
(II)The velocities of R and S were equal at the mid time of the collision.
(III)The mass of R was greater than mass of S.
Text Solution
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(I) Since velocity of both R and S is positive they will move in same direction.
(II) At mid point velocities of R and S are same.
(III) Change in velocity of R is small as compare to change in velocity of S. But change in momentum is same for both in magnitude. Hence mass of R should be greater than S.
Hence all three are correct.
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