Work, Energy, and Simple Machines Mind Map
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Work Done by a Force
highWork is done by a force when the force causes displacement of an object in the direction of the force or with a component along the displacement.
Always check two things before calculating work: force must act, and displacement must occur along the force or its component.
Positive, Negative, and Zero Work
highThe sign of work depends on the angle between force and displacement: work is positive when both are in the same direction, negative when opposite, and zero when perpendicular or when displacement is absent.
Draw force and displacement arrows. Same direction gives positive work, opposite direction gives negative work, and perpendicular gives zero work.
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