1. A block of mass m slides a distance d straight down the surface of a rough ramp. It has speed vi at the top and speed v2 at the bottom. The angle between the ramp surface and the horizontal is 0. Which expression below describes the heat energy generated during this motion? A) -mv? -- muz + mg d sin 0 B) =mv? -=mv2 - mg d cose C) mgd D) mg d cose E) Cannot be determined from the information given 3. The graph shows the gravitational potential energy of a cart of mass m = 400 kg on a frictionless roller coaster track as a function of horizontal position x (in meters). It is known that the cart is at position x = 30 m and moving to the right at a speed of v = 5 m/'s. What will eventually happen to the cart? (There are no other hills on the track, besides those shown.) PE (J) 10,000 Hill It Hill 3 5000 Hill 2 50 100 150 200 x (meters) A) The cart will make it over all three hills and exit to the right of the graph. B) The cart will not make it over hill 1, and will exit to the left of the graph C) The cart will make it over hill 1, but not hill 2 and will eventually exit to the left of the graph D) The cart will make it over hill 1 and then roll back and forth between hills 1 and 2, staying in that valley E) The cart will roll back and forth between hills 1 and 3, moving between the two valleys indefinitely.5. What is the magnitude of the net force of gravity on the mass in due to the masses M (9 and 3M nearby, as shown in the diagram? IGMm A) I 22 5 (Wm B) W o 7 GMm C) E R2 76Mm 2R D) Z R2 E) 4 GMm R2 6. Consider two air carts of masses m and 2m, initially at rest. You push each cart with the same constant force for 6 seconds. At the end of that time, the momentum of the heavy cart is... A) 1A the momentum of the light cart B) 1/2 the momentum of the light cart C) equal to the momentum of the light cart D) twice the momentum of the light cart E) four times the momentum of the light cart 7. I nd myself with some PHYS 2010 lab apparatus on planet X. Using the apparatus, I measure the acceleration due to gravity on the surface of planet X to be 2.2 m/sl. If the radius of planet X is 3500 km, What is its mass? A) 1x10l3 kg B) 17:1017 kg C) 4 x1023 kg D) 6x1024kg E) None of the answers is correct