Diego has done more work since work is the product of force and displacement, and the work done by Diego is proportional to his weight and the ladder's height.
The work done in lifting an object against gravity is determined by the product of the force applied and the vertical displacement. In this scenario, both Diego and Rory climb a 4.89 m ladder in the same amount of time, meaning they cover the same vertical distance.
Diego's weight is 823 N, and the work he does against gravity is calculated as Work Diego=Force Diego×Displacement. Since the displacement is the same for both Diego and Rory, the comparison is based on the force exerted.
Similarly, Rory's weight is 951 N, and his work is calculated as Work Rory=Force Rory×Displacement
Comparing the two, Diego has done more work because his weight is less, and therefore, he exerts less force against gravity while covering the same vertical displacement. Work done is a scalar quantity and depends on both the force applied and the distance traveled in the direction of the force, and in this case, Diego has done more work in lifting himself up the ladder.