A golf ball was dropped 20m and bounced back 15m. Why did it not return to the 20m mark?

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

a skateboard rolling across the street - apex

80cm/s.

24cm/s.

53.3cm/s.