Question 8
Work, Energy and PowerA constant force of 40 N acting on a body initially at rest gives an acceleration of 0.1 m s−2 for 4 s. Calculate the work done by the force
- A.8 J
- B.10 J
- C.32 J
- D.160 J.
Show the answer and explanation
Answer: C (32 J)
Explanation
Distance moved s = ½at² = ½ × 0.1 × 16 = 0.8 m. Work = 40 × 0.8 = 32 J.