Table 4.

Energy values corresponding to different falling heights of 300 g ball.

Falling height/cm	Energy/J (S1)	Energy/J (S2)	Energy/J (S3)	Energy/J (S4)
50	0.48	0.58	0.18	0.12
80	0.65	0.75	0.25	0.15
100	0.79	0.85	0.37	0.16