5. A block of mass m = 22.0 kg slides down a frictionless ramp with a constant acceleration. The ramp is at an angle 0 = 48.0° with respect to horizontal. While the blockslides down the ramp, a person is pulling on the block from behind using a rope under tension. (This applied force, F in the diagram, acts to reduce the acceleration of the block from what it would be if it were sliding freely.) The applied force has a constant magnitude and is angled with respect to the ramp by ø = 20.0°. After sliding down the ramp for d = 0.450 m, the kinetic energy of the block has increased by 60.0 J. (a) [10] Define the system to be the block alone. Apply the work kinetic energy theorem, AK = W net, to the block to determine how much work the applied force,F, does on the block. Give a numerical answer. (b) [5] Use your answer to (a) along with the definition of work for a constant force,W = F · d, to calculate the magnitude of the applied force, F. Give a numerical answer.

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5. A block of mass m = 22.0 kg slides down a frictionless ramp with a constant acceleration. The ramp is at an angle 0 = 48.0° with respect to horizontal. While the blockslides down the ramp, a person is pulling on the block from behind using a rope under tension. (This applied force, F in the diagram, acts to reduce