A grate is moved 2m along a horizontal floor at a constant speed by a force of 50N which makes an angle of 30 above the horizontal. How much work is done on the grate by the force?
A 200g object is dragged 50cm upward with a uniform velocity along a plane inclined 30 with the horizontal by a force parallel to the incline. The coefficient of kinetic friction between the object and the plane is 0.25.
a. How much work is done by the applied force?b. What is the total work done on the object by the different forces acting on it?
