Answer: 746 W.
- A 100 W
- B 746 W
- C 1000 W
- D 1200 W
Correct answer: B. 746 W
Explanation: 1 HP = 746 W (approximately). Used to rate engines and motors.
As a pendulum swings, total mechanical energy (KE+PE) stays constant: at the highest points A and C, all energy is potential (zero speed); at the lowest point B, all of that energy has converted into kinetic energy (maximum speed).
Concept context
Work-energy theorem, potential energy, conservation of energy, collisions.