A student lifts a weight of 10.0 N a distance of 0.500 meters. The energy needed to do this work in calories is (1 cal = 4.186 Joules)

Question

Quizplus · Accepted Answer

The work done by the student is given by W = Fd = 10.0 N x 0.500 m = 5.00 J.
To convert Joules to calories we use the conversion factor 1 cal = 4.186 J.
Therefore, the energy needed in calories is (5.00 J) / (4.186 J/cal) = 1.19 cal (rounded to 3 significant figures).

A Student Lifts a Weight of 10