Explanation:
Distance convered 150m to 60m above the ground = 150- 60=87m
final velocity to cover 87 m as follows:
v^2 =u^2 + 2gh
v^2= 0^2 + 2×9.8××87
v^2=1705.2
v = ✓1705.2
v=41.29 m/s
kinetic energy of the ball as follows:
kinetic energy= 1/2mv^2
E =1/2×15×41.29^2
E =12.8KJ
