Question 9
Work, Energy and PowerAn object of mass 50kg is released from a height of 2m. Find the kinetic energy just before it strikes the ground.
- A.250 J
- B.1000 J
- C.10 000 J
- D.100 000 J
Show the answer and explanation
Answer: B (1000 J)
Explanation
The potential energy lost becomes kinetic energy: mgh = 50 × 10 × 2 = 1000 J.