Lesson: Mechanical Power
In this lesson, we will learn how to calculate the power required for a force to do an amount of work on an object in an amount of time.
Sample Question Videos
Worksheet: 11 Questions • 1 Video
Which of the following formulas correctly shows the relationship between the time taken to do an amount of work and the power supplied to do the work?
A construction worker has to push a heavy, loaded waste container to a disposal area. This task tires the worker out and he pauses several times to rest. The distance that the container is moved in each 10-second time interval is shown in the table. Whenever the worker pushes the container, an average force of 80 N is used to push it. What is the average power supplied by the worker over the ten time intervals?
|Time Interval Number||1||2||3||4||5||6||7||8||9||10|
The power supplied by a force over a 10-second time interval is shown in the graph.
How much work does the force do from = 0 s to = 2 s?
How much work does the force do from = 3 s to = 5 s?
How much work does the force do from = 2 s to = 3 s?
How much work does the force do from = 5 s to = 9 s?