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Diagram shows v-t graph for two masses R and S that collided elastically. Show that.... 1)R and S move in same direction after collision. 2)KE of system is minimum at t=2millisec. 3)mass of R > mass of S.

Diagram shows v-t graph for two masses R and S that collided elastically. Show that.... 
1)R and S move in same direction after collision. 
2)KE of system is minimum at t=2millisec. 
3)mass of R > mass of S. 

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Grade:12th pass

2 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
2 years ago
dear student,
RandSboth have positive velocity after the collision, hence they are moving in the same direction.
At the midpoint of the collision both the velocity-time curves intersect. Hence they have the same velocity at the mid time of the collision.
After the collision,Rhas a lesser velocity, hence it has a higher mass in order to keep the momentum conserved.
thank you.
Vikas TU
14149 Points
2 years ago
(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.

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