5. In the figure below a box of mass 49 kg slides up ramp with friction. The top of the ramp is 8.5 m above the ground. The minimum speed required for the block to reach the top of the ramp is 19.35 m/s. How much energy is lost to friction as it slides from the bottom of the ramp to the top of the ramp ? 6. In the figure below a box of mass 38 kg slides up a frictionless ramp. It has a speed 14.9 m/s at the bottom of the ramp. How much potential energy does it have when it reaches its highest point. 7. In the diagram below the box which has a mass of 21kg is pulled by a force f= 17.6 N at an angle 0 = 45 degrees above the horizontal . The box moves 0.7 m to the right. How much work does the force make . 8. How much work do you do lifting a 35 kg box vertically upward 1.3 n at a constant speed