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Science 13 Online
Pinkalicious13:

A student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the table. If she applies a force of 5 newtons to lift these books, what is the work done? A. 0 joules B. 2.5 joules C. -2.5 joules D. 10 joules E. -10 joules

jason78687:

Use Work=F.SCos@ where @ is angle between applied force and direction of motion

TheKaylaHope:

The work done can be calculated by multiplying the force applied by the distance moved in the direction of the force. In this case, the distance moved in the direction of the force is 2 meters, so: Work = Force x Distance = 5 newtons x 2 meters = 10 joules Therefore, the work done by the student in lifting the books is 10 joules, which is option (D).

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