State the conditions when work done is zero,positive, negetov
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Work done is positive when the angle between the force and the displacement is less than 90 degree
+ve work= angle <90°
work done is zero when the angle between the force and the displacement is equal to 90 degree
0 work=90°
Work done is negative when the angle between the force and the displacement is more than 90 degree
-ve work = >90°
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