Question 4. [20 points] Consider the velocity vs. time graph shown velocity vs. time graph acceleration vs. time graph in the figure at right. i. [8 points] Sketch the acceleration vs. time graph in the space provided. Explain your reasoning ii. [4 points] Describe the motion of the object. B. [6 points] Sketch the velocity versus time graph, given the position graph. Explain. X VQuestion 5. [15 points] Santa Claus (not drawn to scale) decided to take some time off and get away from the reindeers for a bit after the holidays. He takes his sleigh on some hills at the north pole. Santa and his sleigh have a combined mass of 760 kg. He starts from 25 m rest at the top of the hill (shown), at a height of 25 m. Assume it's pretty icy and there is no 5 m friction on the hill. A. [7 points] What is the energy at the top of the hill in Joules for the Santa-Sleigh system? What type of energy is this? PE? KE? Both? Explain. . [8 points] Find the velocity of the Sant-sleigh system at the top of the small hill, with a height of 5 m. What type of energy is this? PE? KE? Both? Explain.MC Questions. [21 points] 1. A motorcycle is traveling around a circular race track at a constant speed. Which of the following is true? A. The acceleration of the motorcycle is 0. B. The acceleration of the motorcycle is in the direction of the velocity. C. The acceleration of the motorcycle is directed toward the center of the track. D. None of the above 2. A member of the CSU basketball team runs from the ground floor to the top floor of the science building (Run 1). She then repeats the exercise but runs from the ground floor to the top floor in half the time (Run 2). Which of the following are true? A. The power exerted in run 2 is half the power in run 1. B. The power exerted in run 2 is twice the power in run 1. C. The power is equal in each run. None of the above 3. The Biological Society decides to hang a sign on the rod shown at right because they love physics. After it is hung the string on the right suddenly breaks (shown). After the sign swings around a bit it comes to rest. What has happened to the torque about the joint after the string breaks? A. The torque has increased. B. The torque has decreased. C The torque remains the same. 4. An ideal gas is contained in a cylinder. The cylinder is closed by a piston as shown in the diagram below, and oriented vertically. The piston is secured so that it cannot move. Gas cannot escape from the piston. A flame is placed underneath, increasing the temperature of the gas. Which is correct? A. The volume of the gas increases (but not the pressure). B. The pressure of the gas increases (but not the volume). C. The number of moles of gas increases. D. All are true. The volume of the gas increases and the pressure increases. 5. The graphs below show a piston undergoing either one or two processes. Which process does the greatest amount of work? A. Process A B. Process B C. Process C D. Process D E. Process B and D are the greatest and are equal. Ev . Which of the following statements are always true? A. If heat is added to a system, the temperature will increase. B. If AU = 0, the process is called an isothermal process. C. In an adiabatic process the temperature remains constant. D. All of the above . Which of the graphs below show an isobaric process? A. Graph A B. Graph B Graph C