A student raises a 1-kg textbook 1 m off the surface of a table.How does the work done by gravity W_g on the book compare to the work done by the student W_s on the book?

Question

Quizplus · Accepted Answer

The work done by the student (Ws) is positive as they lift the book against gravity, while the work done by gravity (Wg) is negative as it acts in the opposite direction. The magnitudes are equal, but the signs are opposite, so Wg < Ws.

A Student Raises a 1-Kg Textbook 1 M Off the Surface