A  boby is moving in a room  with  a velocity of  `20m//s` perpendicular  to the two  walls
Channel: Doubtnut
Date: 2020-08-30

A  boby is moving in a room  with  a velocity of  `20m//s` perpendicular  to the two  walls   separated by 5  meters  .There  is no friction and the collisionnn with the walls  are elastic.