18. A man pushes 500-54 box up a 5.0-m long ramp. The box was raised a vertical dietance of 25 m The actual work done by the worker was - TSOJ D 1250 J D4 1500 J De 2500 J

To calculate the actual work done by the worker, we need to use the formula for work: where:- Force is the force applied by the worker,- Distance is the distance over which the force is applied,- is the angle between the force and the direction of motion.In this case, the force applied by the worker is equal to the weight of the box, which is the mass of the box multiplied by the acceleration due to gravity. The mass of the box is given as 500 kg, and the acceleration due to gravity is approximately 9.8 m/s².So, the force applied by the worker is: The distance over which the force is applied is the length of the ramp, which is given as 5.0 m. The angle is the angle between the force and the direction of motion, which is 90 degrees since the force is applied vertically and the motion is horizontal.So, the actual work done by the worker is: Therefore, the actual work done by the worker is 0 J.