A ball dropped on to the floor from a height of 10 m rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.02s, its average acceleration during contact is

A ball dropped on to the floor from a height of 10 m rebounds to a hei

1.	A ball dropped on to the floor from a height of 10 m rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.02s, its average acceleration during contact is
Answer» `2100ms^(-2)` `1050ms^(-2)` `4200ms^(-2)` `9.8ms^(-2)` ANSWER :B