In physics, work is the use of force to move something through a distance. For e

Question

In physics, work is the use of force to move something through a distance. For example, if you lifted 4 pounds straight up 10 feet, you would bedoing 40 foot-pounds of work. If you did that in two seconds, you would be doing work at rate of 40 foot-pounds in 2 sec., or 20 foot-pounds per sec.. The rate of doing work is called power.

Suppose a roller coaster train weighing 4,000 pound is pulled to a hight of 200 feet in 15 sec. How much power would that require, in foot-pound per sec? If 1 foot-pound per sec. is equal to 1.3 watts,what is the power required in kilowatts?

Explanation / Answer

53333.333 foot-pounds of work =69.33 kilowatt

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