Please help with the following question:

PHYSICS C: MECHANICS SECTION II Time-45 minutes 3 Questions Directions: Answer all three questions: The suggested time is about 15 minutes for answering each of the questions, which are worth 15 points each. The parts within a question may not have equal weight. Show all your work in this booklet in the spaces provided after each part. MH Mech. 1. A block of mass mg is being pulled up a ramp by a hanging object of mass my , as shown in the figure above. The blocks are attached to each other by a light string that passes over a pulley of negligible mass and friction. Both the block and the hanging object are moving at constant speed, and the angle of the ramp with the horizontal is 0 . The coefficient of kinetic friction between the block and the ramp is #* . (a) On the dots below, which represent the block and the hanging object, draw and label the forces (not components) that act on the block and the hanging object. Each force must be represented by a distinct arrow starting on, and pointing away from, the appropriate dot. Block Hanging Object (b) Derive an expression for the mass my of the hanging object. Express your answer in terms of me , 0 , Uk , and physical constants, as appropriate. If you need to draw anything other than what you have shown in part (a) to assist in your solution, use the space below. Do NOT add anything to the figure in part (a). Unauthorized copying or reuse of any part of this page is Illegal. GO ON TO THE NEXT PAGE.It is determined that me = 2.0 kg, 0 = 30 , and /x = 0.10. While the block is moving up the ramp and the hanging object is moving downward, the string is suddenly cut. (c) i. Calculate the magnitude of the acceleration of the block immediately after the string is cut. ii. What is the direction of the acceleration of the block immediately after the string is cut? Up the ramp Down the ramp No direction, because the acceleration is zero iii. Determine the magnitude of the acceleration of the hanging object immediately after the string is cut. (d) Assume the block is moving up the ramp at 2.0 m/s when the string is cut. Calculate how far the block travels up the ramp from the time the string is cut until the block stops, assuming there is sufficient distance on the ramp. Unauthorized copying or reuse of any part of this page is Illegal. GO ON TO THE NEXT PAGE