In the figure here, a block of ice slides down a frictionless ramp at angle e=51.0 ° while an ice worker pulls on the block (via a rope) with a force that has a magnitude of 51.0 N and is directed up the ramp. As the block slides down through distance d = 0.580 m along the ramp, its kinetic energy increases by 83.0 J. How much greater would its kinetic energy have been if the rope had not been attached to the block?

A block is displaced vertically by Ar = 2.5 m under the influence of three forces, F = 4.0 N, FR = 6.0 N, and F = 8.0 N as shown in the diagram. The angles 0c = 15°. There are no other forces acting on the block. What is the net work done by these three forces on the block? FB %3D %3D %3D 0c FA W = FArcos(0)

Starting from rest at t = 0, a 5.0-kg block is pulled across a horizontal surface by a constant horizontal force having a magnitude of 12 N. If the coefficient of friction between the block and the surface is 0.20, at what rate is the 12-N force doing work at t = 5.0 s? 26 kW 0.12 kW 0.14 kW 12 kW 0.13 kW

In the figure, a 0.24 kg block of cheese lies on the floor of a 960 kg elevator cab that is being pulled upward by a cable through distance d1 = 2.2 m and then through distance d2 = 10.8 m. (a) Through d1, if the normal force on the block from the floor has constant magnitude FN = 3.16 N, how much work is done on the cab by the force from the cable? (b) Through d2, if the work done on the cab by the (constant) force from the cable is 93.33 kJ, what is the magnitude of FN?