Average speed of 0~0.5s: v1= h1/0.5 = 3.75/0.5 = 7.5m/s.

The linear motion has uniform acceleration, and the clockwise speed at the middle moment is equal to the average speed.

That is, v (0.25s) = v1= 7.5m/s.

Then v (0.75s) = v (0.25s)+g * 0.5s =12.5m/s.

The average speed of the second cycle is v2 = v (0.75s) =12.5m/s.

H2 = v2 * 0.5s = 6.25m

In the same way.

V3 =17.5m/s

H3 = 8.75m