How much work is done when a force of 15.0 newtons is used to lift a box 3.0 meters into the air?

45 joules

Work done by an object is given by the product of force and distance.

Work done is measured in Joules.

Work done = Force × distance;

Force = 15 Newtons, and Distance = 3.0 meters

Therefore;

Work done = 15 × 3

                   = 45 Joules

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