1 If v = At + Bit where, v is velocity and t is time, then the SI unit of B is m B) m A) C ) m D) m 2 The distance between position A and B is 120.0 km. The entire travel time for a car to go from A to B and then comes back to A is 4.00 h. The average speed of the car during this travel time is A) 0.00 m/s B) 16.7 m/s C) 60.0 m/s D) 30 m/s The graph shows the postion, x of an object as a function of time, t. In the graph, the object's motion with time is best described as A) Constant positive velocity 30 B) constant negative velocity constant acceleration (D) constant deceleration 20 4 The graph of position vs. time for a car is given below. What can you say about the velocity of the car over time? A) it speeds up all the time B) it slows down all the time C) it moves at constant velocity D) sometimes it speeds up and sometimes it slows down 5 These four motion diagrams show the velocity of a particle along the x-axis. Taking the left to be the positive x direction, which motion diagram corresponds to a positive velocity and deceleration? San