A car of mass 1,000 kg moving at 20 m/s crashes into a wall and stops in 0.10 seconds. What is the average force exerted on the car by the wall?
A2,000 N
B20,000 N
C200,000 N
D20 N
Explanation
📌 Impulse = change in momentum. F × t = Δp = m × Δv. F = (1000 × 20) / 0.10 = 20,000/0.10 = 200,000 N. Distractor A divided incorrectly; B forgot to divide by the short time; D used m/v erroneously.