Question

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?

Answer 1

Choice (D) 10J

Answer 2

Work (W) is the product when we multiply the force applied (F) and the displacement (d). The displacement and the force applied should be in the same direction for the force to be done.
W = F x d
Substituting the given values,
W = (5 N) x (2 m) = 10 Nm
Therefore, the work done is 10 J.