2. A stoplight 20 m to the west turns yellow. Your car is traveling west at 12 m/s. You hit the brakes and decelerate at a rate of 6.0 m/s 2. Your car stops before it reaches the stoplight (which is considered to be at the origin). A student in a physics class made a picture of this. t o = 0 s x o = + 20 m v o = – 12 m/s a = – 6.0 m/s 2 Which of the following is labeled wrong? 1x o 2v o 3a 4a & v o 5all of the values are correct x

3. A student in a physics class made a picture of the situation but did not include the signs of the variables. t o = 0 s x o = __ 20 m v o = __ 12 m/s a = __ 6.0 m/s 2 What are the signs of the three missing variables? xo voa1+––2+–+3++–4+++5––+xo voa1+––2+–+3++–4+++5––+ x A stoplight 20 m to the west turns yellow. Your car is traveling west at 12 m/s. You hit the brakes and decelerate at a rate of 6.0 m/s 2. Your car stops before it reaches the stoplight (which is considered to be at the origin).

4. The motion of a car is represented with the motion diagram below. Which graph best matches the motion diagram? 5No graph represents the motion correctly v t 1 v t 2 v t 3 v t 4 x v initial v final a

5. Which graph is the best representation of the car’s motion? x t 1 x t 2 5No graph represents the motion correctly x t 3 t x 4 A stoplight 20 m to the west turns yellow. Your car is traveling west at 12 m/s. You hit the brakes and decelerate at a rate of 6.0 m/s 2. Your car stops before it reaches the stoplight (which is considered to be at the origin).

6. v o a 1 + – 2 + + 3 – + 4 – – A bicycle is moving on the road. Its motion is described by the graph below. Below is a mathematical description of the same motion. What should the signs of v o and a be to be consistent with the above graphical description? v t

7. A hot air balloon is stationary in the sky as seen in the picture. A person throws a ball up in the air at 5 m/s. Which set of equations best matches this process? 1.V f = (5.0 m/s) + (10 m/s 2 ) t 2.V f = ( - 5.0 m/s) + (10 m/s 2 ) t 3.V f = (5.0 m/s) + ( - 10 m/s 2 ) t 4.V f = ( - 5.0 m/s) + ( - 10 m/s 2 ) t 5.Either 2 or 3 are correct

8. Which graph best represents this situation? x t 1 5Graphs 3 & 4 6Graphs 2, 3 & 4 7No graph represents the motion correctly x t 3 t x 4 The mathematical representation seen below is in a physics textbook. x t 2

9. Which description best represents this situation? 1This is a car that is moving to the right and is accelerating in the same direction. 2A ball was thrown upwards in the air at a speed of 20 m/s. 3A ball was thrown downwards at a height of 5 m at a speed of 20 m/s. Susy sees the mathematical representation below in her physics book.

10. 1.Yes, all three diagrams are consistent. 2.No, Diagram A is not consistent with the other two. 3.No, Diagram B is not consistent with the other two. 4.No, Diagram C is not consistent with the other two. 5.None of the diagrams are consistent. Are these three diagrams consistent with each other? Alan sees the following three diagrams next to each other in his physics book. x t v t a t A CB

11. A car is moving along the road as seen in the motion diagram below. Which set of equations best matches this process? 1.V f = (5.0 m/s) + (10 m/s 2 ) t 2.V f = ( - 5.0 m/s) + (10 m/s 2 ) t 3.V f = (5.0 m/s) + ( - 10 m/s 2 ) t 4.V f = ( - 5.0 m/s) + ( - 10 m/s 2 ) t 5.Either 2 or 3 are correct x + v final v initial