Question
Physics Question on Elastic and inelastic collisions
Two balls of same mass each m are moving with same velocities v on a smooth surface as shown in figure. If all collisions between the masses and with the wall are perfectly elastic, the possible number of collisions between the bodies and wall together is
A
1
B
2
C
3
D
infinity
Answer
3
Explanation
Solution
The speeds of balls remain unchanged after collisions. Then there are only three collisions between balls and wall together.