WAEC - Physics (2019 - No. 6)
A body of mass 2 kg is released from a point 100 m above the ground. Calculate its kinetic energy 80m from the point of release.
1600 J
900 J
600 J
200 J
説明
K.E = mgh
but h = 80m, m = 2kg, g = 10m/s^2
K.E = 2 x 10 x 80 = 1600J.