If a ball strikes with a velocity `u_(1)` at the wall which itself is approaching it with a velocity `u_(2)` then find the velocity of the ball after collision with the wall.
Text Solution
Verified by Experts
As the wall is heavy so after collison it will continue to move with the same velocity `u_(2)`. Relative velocity of separation is equal to relative velocity of approach. Hence, `v_(1)-v_(2)=e(u_(1)-u_(2))` `impliesv_(1)(-u_(2))=-e[u_(1)-(-u_(2))]` `implies v_(1)=-e(u_(1)+u_(2))-u_(2)` In case of perfectly elastic collision `e=1` `v_(1)=-u_(1)-u_(2)-u_(3)=-(u_(1)+2u_(2))` Negative sign indicates backward direction.
A ball falls from a height of 5 m and strikes a lift which is moving in the upward direction with a velocity of 1 m s^(-1) , then the velocity with which the ball rebounds after collision will be
A wall moving with velocity 2 cms^(-1) towards the ball and ball is moving towards the wall with a velocity 10 cms^(-1) . It hits the wall normally and makes elastic collision with wall. The velocity of ball after collision with wall in cms^(-1) .
A ping-pong ball strikes a wall with a velocity of 10 ms^(-1) . If the collision is perfectly elastic, find the velocity if ball after impact
A ball moving with a velocity v strikes a wall moving toward the wall with a velocity u. An elastic impact occurs. Determine the velocity of the ball after the impact. What is the cause of the change in the kinetic energy of the ball ? Consider the mass of the wall to be infinitely great.
A particle of mass m moves with velocity u_(1)=20m//s towards a wall that is moving with velocity u_(2)=5m//s . If the particle collides with the wall without losing its energy, find the speed of particle just after the collision.
A small ball of mass m collides with as rough wal having coeficient of friction mu at an angle theta with the normal to the wall. If after collision the ball moves wilth angle alpha with the normal to the wall and the coefficient of restitution is e , then find the reflected velocity v of the ball just after collision.
A ball collides elastically with a massive wall moving towards it with a velocity of v as shown. The collision occurs at a height of h above ground level and the velocity of the ball just before collision is 2v in horizontal direction. The distance between the foot of the wall and the point on the ground where the ball lands, at the instant the ball lands, will be :
