Question

if work is scalar quantity the why negative work is denoted with minus sign ?
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Answer 1

Answer:

If the displacement is in the direction of the force, then work is positive. If the displacement is in the opposite direction of the force, then work is negative. If the displacement is perpendicular to the direction of the force then work is zero.

So, the work done depends on direction. So work should be a vector quantity. Then how is work a scalar quantity?