1. A student in a physics class made a picture of this.
1. East is considered positive. A stoplight 20 m to the west turns yellow. Your car is traveling west at 12 m/s. You hit the brakes and slow down at a rate of 6.0 m/s2. 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. x
to = 0 s
xo = + 20 m
vo = – 12 m/s
a = – 6.0 m/s2
Which of the following is labeled wrong?
a. xo
b. vo
c. a
d. a & vo
e. all of the values are correct

2. Which graph best matches the motion diagram?
2. The motion of a car is represented with the motion diagram below. x
vinitial
vfinal a
Which graph best matches the motion diagram? v t b v t c v t a. v t d
e. No graph represents the motion correctly

3. Below is a mathematical description of the same motion.
3. A bicycle is moving on the road. Its motion is described by the graph below. v t
Below is a mathematical description of the same motion.
What should the signs of vo and a be to be consistent with the above graphical description?
vo a
a – b
c –
d – –

4. 4. 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?
a. Vf = (5.0 m/s) + (10 m/s2) t
b. Vf = ( m/s) + (10 m/s2) t
c. Vf = (5.0 m/s) + ( - 10 m/s2) t
d. Vf = ( m/s) + ( - 10 m/s2) t
e. Either b or c are correct

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

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