12. Starting from rest, a motorcycle has an average acceleration of 5 m/s² for 30 seconds until it reaches the school. How far has it traveled during this time? B. 2250 m A. 2000 m C. 2500 m D. 3000 m 13. A car is initially cruising along a straight horizontal highway at 15 m/s when the driver stepped on the accelerator and the car gained an acceleration of 8m/s² and covers a distance of 100 m. Determine its final velocity. B. 42.72 m/s A. 45.2 m/s C. 40.34 m/s D. 43.2 m/s 14. A piece of paper, notebook and a book fall in the absence of air resistance. Which is correct about their acceleration? A. The book has the greatest acceleration among the three objects. B. The notebook has greater acceleration than the paper. C. The piece of paper has the greatest acceleration. D. The three objects have the same acceleration. 15. A marble is dropped from a 5-m high hanging cabinet. How long does it take for the marble to hit the ground? (use g = -10 m/s2) B. 1.2 s C. 1 s D. 1.4 s A. 1.5 s​