As shown by the graph, during which sections is the object accelerating? OA) Y and Z only OB) X, Y, and Z only OC) X and Y only OD) W, X, and Z only 5. An airplane takes off at 220 km/h, angling upwards 38 from the runway. The airplane is gaining altitude initially at a speed of OA) 135 km/h OB) 220 km/h OC) 173 km/h OD) 357 km/h 6. Position of an Object over Time 8 8 8 8 8 8 68 8 8 Position (m) 12 20 24 28 Time (seconds) The average velocity of the object between 4.0 and 14.0 seconds is OA) 240 m/s OB) 8 m/s OC) 0.0 m/s OD) 40 m/s 7. Refer to the information in question 6. During which of the following time intervals is the object stopped? OA) 8.0 s to 12.0 s OB) 12.0 s to 16.0 s OC) 16.0 s to 20.0 s OD) 0.0 s to 6.0 s 8 The diagram shows a 1.50 kg cart on top of a table attached to two masses by strings going over frictionless pulleys. The coefficien of kinetic friction between the cart and the table is 0.160. 1.50 kg Mass A Mass B If the mass of A is 2.00 kg and the mass of B is 4.0 kg, what is the acceleration of the cart?Please wait until the exam has fully loaded in your web bmWSer before starting. Do not press "Submit" at the end of the exam until you are sure of your responses, as your test will be graded immediately. Good luck! 1. Which of the following quantities is a vector quantity? OA) displacement OB) distance DC) potential energy OD) work 2. Newton's First Law of Motion states that an object will OA) create an equal and opposite reaction force when an external force is exerted on it OB) repel another object with a force proportional to the force given to it OC) accelerate when a net force is applied to it OD) stay at rest or in uniform motion unless an net force acts on it ' I 3, A student rides a bicycle at 18.0 mfs around a circular track that has a radius of 100.0 m. Ifthe mass ofthe student and bicycle is 120 kg what is the centripetal force? OA)21.6N OB)156N OC)3.89N OD)389N The velocity-time graph describes the motion of an object travelling in a straight line during sections W, X, Y, and Z. Velocity at an Object over Time As shown by the graph, during which sections is the object accelerating? OA) Y and 2 only OB) X, Y, and Z only OC) X and Y only OD) W, X, and Z only 7. Refer to the information in question 6. During which of the following time intervals is the object stopped? OA) 8.0 s to 12.0 s OB) 12.0 s to 16.0 s OC) 16.0 s to 20.0 s OD) 0.0 s to 6.0 s 8. The diagram shows a 1.50 kg cart on top of a table attached to two masses by strings going over frictionless pulleys. The coefficient of kinetic friction between the cart and the table is 0. 160. 1.50 kg Mass A Mass B If the mass of A is 2.00 kg and the mass of B is 4.0 kg, what is the acceleration of the cart? OA) 8.16 m/s2 OB) 11.5 m/s2 OC) 9.81 m/s2 OD) 2.3 m/s2 9. An 80.0 kg person is standing on a bathroom scale in an elevator that is accelerating upwards at 3.75 m/s . What does the scale read? OA) 785 kg OB) 80 kg OC) 111 kg OD) 300 kg 10. One newton (N) may be defined as the OA) force on a 1.0 kg mass accelerating at 1.0 m/s2. OB) force on an object when undergoing free-fall. OC) mass of an object accelerating at 9.8 m/s. OD) acceleration of an object with a mass of 1.0 kg