Question

A tennis ball is released from a height of 4.0 m above the floor. After its third bounce off the floor, it reaches a height of 183 cm. What percentage of its mechanical energy does it lose with each bounce?

15%
27%
20%
23%

Answer 1

E = mgh
the percentage = E1/E2= h/h=1.83/4=0.4575
and it make 3 to reach that height, so divide it by 3 = 0.15= 15%.

Answer 2

Thanks

Answer 3

you are welcome.