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.
A
1600 J
B
900 J
C
600 J
D
200 J
Verified Correct Answer: A.
Physical Principles & Numerical Solution
K.E = mgh
but h = 80m, m = 2kg, g = 10m/s^2
K.E = 2 x 10 x 80 = 1600J.
Source: Myschool Past Questions Archive (Record #58793)