what is positive work ?????
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Work done by a force is positive if the applied force has a component in the direction of the displacement. Also, if the force acts perpendicular to the direction of motion, or if the displacement of the object is zero, then work done is zero.
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Positive work: when force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. ... Example: Work was done the gravity on a rocket going perpendicular upwards.
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