A student lifts a textbook vertically from the floor to a -high shelf
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power
Problem
A student lifts a 3kg textbook vertically from the floor to a 2m-high shelf. In Trial 1 the lift takes 4s; in Trial 2 the lift takes 1s. Which statement best compares the work done on the textbook and the average power supplied by the student in the two trials?
(a) The work is the same in both trials, and the average power is the same in both trials.
(b) The work is greater in Trial 2, and the average power is four times greater in Trial 2.
(c) The work is the same in both trials, and the average power is four times greater in Trial 2.
(d) The work is the same in both trials, but the average power is one-quarter as large in Trial 2.