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OpenStudy (faiithhh):
Work is done when... a. the displacement is not zero b. the displacement is zero c. the force is zero d. the force and displacement are perpendicular
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OpenStudy (faiithhh):
jk it's A. I figured it out!
OpenStudy (kunaliiserb):
work is done when there is a non-zero component of force in the direction of displacement( which again should be non-zero). Which looks obvious from it's formula:\[dW = F \cos \theta *dx\]
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