A worker drags a crate with a constant force of from point P to point Q
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A worker drags a crate with a constant force of 50N from point P to point Q, a displacement of 12m due east. He then drags the crate back from Q to P with the same magnitude of force acting due west along the same path.
(a) What is the net displacement of the crate after the round trip?
(b) Calculate the total work done by the worker on the crate for the whole journey.
(c) State briefly why this result is obtained even though the crate has travelled a total distance of 24m.