Question Detail
Question
A car of mass 1200kg accelerates from rest to a speed of 25m/s in a time of 8.0s. What is the average power produced?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Work done = change in kinetic energy = ½ × 1200 × 25² = 600 × 625 = 375,000 J. Average power = work/time = 375,000/8 = 46,875 W ≈ 47.00 kW.
Hint
Average power = work done/time = change in kinetic energy/time.