Work done by the child = 0.20 J
Mass of the toy m = 0.010 kg
g = 9.8 m/s
Work is that is potential energy because it is at maximum height, PE = m x g x h
0.20 = 0.010kg x 9.8m/s x h => 0.2 = 0.098 x h => h = 0.2 / 0.098 => h =
2.040
The maximum vertical height h = 2.0 mts