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Velocity of COM

A super ball ...

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A super ball is to bounce elastically back and forth between two rigid walls at a dis†an ce d from each other.Neglecting gravity and assuming the velocity of super ball to be V horizontally, the average force being exerted by the super ball on one wall is how much

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Q. A super-ball is to bounce elastically back and forth between two rigid walls at a distance d from each other. Neglecting gravity and assuming the velocity of super-ball to be

V_{0}

horizontally, the average force (in large time interval) being exerted by the super-ball on one wall is:

Q. A ball of mass

0.5 k g

moving with speed of

2.0 m / s

strikes a rigid wall in a direction perpendicular to the wall and is reflected back after a perfectly elastic collision. If the ball has remained in contact with the wall for

0.5 s

, calculate the average force exerted on the ball by the wall.

0.5 k g

collided with wall at

30^{o}

and bounced back elastically. The speed of ball was

12 m / s

. The contract remained for

1 s e c

. What is the force applied by wall on ball:

B

m

is projected with some velocity from a block A of mass

2 m

kept on a smooth horizontal surface. The ball strikes the wall elastically and comes back to the block A. Find the distance of block A from the wall when ball reaches back to it. Velocity in

B

is generated by a compressed spring fixed to block A. When the ball leaves spring, the distance of block from wall is

d

. (Neglect gravity)

Q. A small boy is throwing a ball towards a wall

6 m

in front of him. He releases the ball at a height of

1.4 m

from the ground. The ball bounces from the wall at a height of

3 m

, rebounds from the ground and reaches the boy's hand exactly at the point of release. Assuming the two bounces (one from the wall and the other from the ground) to be perfectly elastic, how far ahead of the boy did the ball bounce from the ground?

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