When is positive work done?
Solution
Positive work is done when the force that is applied to an object and the displacement of the object are in the same direction. Here are the steps to understand it:
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Identify the direction of the force being applied: The first step is to identify the direction in which the force is being applied on an object. This could be any direction - left, right, up, down, etc.
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Identify the direction of the object's displacement: The next step is to identify the direction in which the object is moving or being displaced. This, again, could be in any direction.
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Compare the two directions: The final step is to compare the direction of the applied force with the direction of the object's displacement.
If the force applied on the object and the displacement of the object are in the same direction, then positive work is done on the object. If they are in opposite directions, then negative work is done. If the force is perpendicular to the displacement, no work is done.
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