A worker pulls a crate with a constant horizontal force of
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power
Problem
A worker pulls a crate with a constant horizontal force of 200N. In the first case he drags the crate straight for 4m. In the second case he drags it along a 6m curved path that begins and ends at the same two points as before. Neglect friction. Which statement about the work done by the worker is correct?
(a) The work is the same in both cases because the displacement between the starting and ending points is the same.
(b) The work is 1200J along the curved path and 800J along the straight path since work equals force times distance travelled.
(c) More work is done along the curved path because the worker spends a longer time pulling the crate.
(d) Less work is done along the curved path because the continual change in direction makes the pull partly sideways and therefore less effective.