please show work for 1-3.

Multiple Choice Questions (1 point each) After In th +10 m/s +10 m +20 mA D After After Before Before +20 m/'s +10 ma 10 mA +20 m/ 1. The situations shown above are before and after "snapshots" of the car's velocity. All cars have the same mass and the same distance travelled. Rank the magnitude of the work done on the cars to create these changes in velocity. a. C=D>B>A b. A > B>C=D C. A>C=D>B d. A>B>C>D 5 . 2. A block of mass, m, is pushed so that it moves a distance, d, up the rough surface of a ramp at constant speed. When the block reaches point B it is a height, h, above point A. The net work done on the block while the block moves from point A to point B is a. mgh b. 0 c. umgsined d. umgd A 3. A 30 kg child is swinging on a tire swing of negligible mass. At point A the child is 0.5 m above point B. The speed of the child at point B is most nearly a. 2.2 m/s b. 3.2 m/s c. 5.5 m/s d. 10 m/s