Energy Stores and Transfers Quiz
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5 questions, one answer each
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1. What is the equation for kinetic energy?
- A. Ek = ½mv²
- B. Ek = mgh
- C. Ek = mcΔθ
- D. Ek = ½ke²
2. Power is defined as the rate of:
- A. Force applied
- B. Energy transfer
- C. Distance travelled
- D. Charge stored
3. A 500 g object falls from a height of 2 m (g = 10 N/kg). What is its gravitational potential energy at the top?
- A. 1 J
- B. 5 J
- C. 10 J
- D. 100 J
4. When a moving car brakes and stops, which best describes the energy transfer?
- A. Kinetic energy store increases, thermal decreases
- B. Kinetic energy store decreases, thermal energy stores of brakes/surroundings increase
- C. Gravitational potential energy is created
- D. No energy is transferred
5. A spring with spring constant 200 N/m is stretched by 0.05 m within its limit of proportionality. What elastic potential energy is stored?
- A. 0.25 J
- B. 0.5 J
- C. 2.5 J
- D. 5 J