work done on a system is +ve or -ve
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Work done on a system will be positive or negative - this fact will depend on your procedure of solving the question, how you take the directions of all the forces. Work has no direction as it is. scaler quantity. Work done on a force can be +ve, -ve or zero depending on the frame because work is a frame dependent quantity.
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Hope this helps. Thank you. ☺♥
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