2. (12 points) Circle GNU)!r ONE of the answer choices in the questions below: I: A crate is initially at rest on a horizontal frictionless table, A constant horizontal force F is applied. Which of the following graphs of work W as a function of the crate's speed v is correct? 11' I'E' H" L'- L' U A B (I II' | 11' | u I! D E- II. For a block of mass m to slide without friction up the rise of height h shown, it must have a minimum initial kinetic energy of; A. B. C. D. E. gh mgh gh/Z mgh/2 2mgh In: You and a friend each carry a 15 kg suitcase up two flights of stairs, walking at a constant speed. Take each suitcase to be the system. Suppose you carry your suitcase up the stairs in 30 seconds while your friend takes 60 seconds. Which of the following is true? A. B. C. D. E. Both of you did equal work and used the same power You did more work, but both of you used the same power You did more work and used more power Both of you did equal work, but you used more power Both of you did equal work, but your friend used more power IV: Which one of the following statements is true? A. B. C. D. E. Temperatures differing by 25 on the Fahrenheit scale must differ by 45 on the Celsius scale 40K corresponds to 40 C Temperatures which differ by 100 on the Celsius scale must differ by 180 on the Fahrenheit scale Water at 900 C is warmer than water at 2020 F 0 F corresponds to 32 C