Question 8 (1 point) A car accelerating at 4.5 m/s is experiencing a force of 8.1 x 103 N. What is the mass of the car? 3.6 x 10' kg 1.8 x 10' kg 3.6 x 104 kg 5.6 x 10* kg Question 9 (1 point) Which of the following relative velocity equations is valid and written correctly: OUBD = UBC + VBA + VCD OUDA = VAB + UBC + VCD OUDA = VDC + UCB + VBA OVABCD = VAB + UBC + UCD Question 10 (1 point) Which equation is in its most simplified form and can be used to determine how long will it take an object to stop: t = UfVi O a tQuestion 6 [1 paint} If the object in the diagram is accelerating 3.0 mr'sI [L], what must be the magnitude cf the unknown Force: 4.2 H 2.? kg 1.? n ??? 14 H '1- ('3. 3.? N {3. 2.2 N ('3. 5.5 N