Awheel of radius 50 cm has a moment of inertia of 20 kg-m2. a constant force of 100 n is applied at the rim. (a) assuming it starts from rest, how much work is done in 8 s? (b) what power is developed?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?