Work equals change in gravitational potential energy Steps:

• Calculate the gain in potential energy using W = mgh, as constant speed means no change in kinetic energy.
• Use mass m = 500 kg and g = 10 N/kg.
• From the diagram, the vertical height of the hill h = 1 m.
• Compute W = 500 × 10 × 1 = 5000 J = 5.0 × 10³ J. Why B is correct:
• B matches the potential energy gain mgh, the minimum work required to raise the car (work-energy theorem). Why the others are wrong:
• A assumes h = 10 m, but diagram shows h = 1 m.
• C assumes h = 2 m or includes extra factor, exceeding mgh.
• D assumes h = 20 m, far larger than diagram height. Final answer: B