An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is
A
200J
B
4000J
C
2000J
D
500J
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Kinetic Energy = mgh
= 20 x 10 x 10 J
= 2000J
Source: Myschool Past Questions Archive (Record #26963)