Using good problem solving strategies. Include units and correct significant figures in your answer.

1. Climbing a 5.0 m ladder requires 2400J. What is the power required if the work is done in 6.2 s? How is the power different if the time is cut in half?

2. An electric motor is able to lift a 36.7 kg box a total distance of 110 m in 20.2 seconds. What is the power output of the motor? What is the horsepower rating of the motor?

3. What is the time it would take for a 34 horsepower motor to lift a 15 kg box a distance of 22.5 m?

4. What power must be generated to lift, in 30.0s, a total of 50.0 m, a 350 kg elevator that has people in it that weigh a total of 420 kg?