Why is power equal to velocity x force? (not related to a question just in general)

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

The speed of light can be used to measure the

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?