Work, Power & Energy Resources Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What is the equation for work done?
- A. W = m × g × h
- B. W = F × d
- C. W = ½ × m × v²
- D. W = P × t
2. A 5 kg object is lifted 2 m (g = 10 N/kg). What is its gain in gravitational potential energy?
- A. 10 J
- B. 50 J
- C. 100 J
- D. 500 J
3. A car of mass 1000 kg travels at 10 m/s. What is its kinetic energy?
- A. 5000 J
- B. 10000 J
- C. 50000 J
- D. 100000 J
4. Which energy resource converts sunlight directly into electricity without a turbine?
- A. Wind
- B. Solar cells
- C. Geothermal
- D. Hydroelectric
5. An object falls freely from rest, losing 200 J of gravitational potential energy. Ignoring air resistance, what is its kinetic energy just before hitting the ground?
- A. 0 J
- B. 100 J
- C. 200 J
- D. 400 J