Question

2. How long does it take a 19 kW steam engine to do 6.8 × 107 J of work? Ans: ________________________________

3. A truck weighing 30,000 N was driven up a hill that is 1600 m long to a level area that is 800 m above the starting point. If the trip took 480 s, what was the minimum power required? Ans: ________________________________

4. A motor used 120 W of power to raise a 15 N object in 5 s. Through what vertical distance was the object raised? Ans: ________________________________

5. If an automobile engine delivers 50.0 hp of power, how much time will it take for the engine to do 6.40 × 105 J of work?

Answer 1