Question

what do you mean by zero work ? Give an example
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Answer 1

Explanation:

zero work; if the component of a force is perpendicular to the displacement, zero work is done.

E.g, a boy pushing a wall, a man carrying a load and walking on level ground does no work. Negativ work; if the component of a force is in opposite direction to displacement, the work done is negative!

Answer 2

Answer:

when there is 0 net force .ex when we push a wall it doesnt move from its place so no work is done