Forces and work in Earth-box system · CAP 2003 #24

Physics · mechanics

Problem

A person pulls a box along the ground at constant speed. Considering the Earth and the box together as a system, which of the following is true about the net force F exerted by the person on this system and the work W she does on it? (a) F=0F = 0 and W=0W = 0; (b) F≠0F \neq 0 and W=0W = 0; (c) F=0F = 0 and W≠0W \neq 0; (d) F≠0F \neq 0 and W≠0W \neq 0.

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