Physics Practice OTE 1 Semester 1 Don't write on this packet. Write ...

<strong>Physics</strong> <strong>Practice</strong> <strong>OTE</strong> 1 <strong>Semester</strong> 1
Don’t <strong>write</strong> on this packet. Write only on the answer sheet.
1. Marissa and her family travel from Slidell, Louisiana to Memphis, Tennessee. When Marissa
divides the total distance they traveled by the total time they were traveling, she is calculating
their:
a. instantaneous speed.
b. constant speed.
c. average speed. Correct
d. variable speed.
2. Speed is:
a. calculated by dividing the distance traveled by the time taken.
b. zero for objects at rest.
c. a measure of how quickly an object gets from one place to another.
d. All of the above Correct
3. What's the difference between speed and velocity?
Speed is a scalar and only has magnitude. Velocity has both magnitude and direction.
4. Light travels 3.00x10 8 m/s. How long does it take to go around the Earth (the circumference of the
Earth is 4.01x10 7 m)
v = d/t
t=d/v
v= 3.00 x 10 8 m/s d=4.01 x 10 7 m
t= 4.01 x 10 7 m / 3.00 x 10 8 m/s = =0.133s
5. According to the reading, in the particle method, could you use a runner’s arm or leg as a point for
the motion diagram?
No. You have to ignore the internal motion of the object such as the waving of the arms and
legs. You should choose a point near the center of the runner’s waistline. (page 33)
6. In 1/2 hour, a bicyclist traveled 20 kilometers. What was the bicyclist’s average speed?
v = d/t
v= 20km/0.5hr = 40km/hr

7. You and your friend each drive 50.0km. You travel at 90.0km/hr and your friend travels at
95.0km/hr. How long will your friend have to wait for you at the end of the trip?
d = 50.0km v you = 90.0km/hr v=d/t so t=d/v t you = 50.0km/90.0km/hr = 0.556hr
d = 50.0km v friend = 95.0km/hr t=d/v t friend =50.0km/95.0km/hr = 0.526hr
t you -t friend = 0.556hr – 0.526hr = 0.029hr = 1.8min
8. Which position vs. time graph below shows the slowest speed?
9. You walk 20.0m east then turn around and walk 15.0m west. What is your displacement from
your starting position?
Total distance = 20.0m + 15.0m = 35.0m BUT Displacement depends on direction. If we use
East to be positive: +20.0m + (-15.0m) = +5.0m east
10. Gwennen rides her bicycle 4.8 kilometers up a steep hill in 8 minutes. Her speed is ____
kilometers per minute. (4 points)
a. 0.3 km/min
b. 0.6 km/min Correct
c. 1.67 km/min
d. 38.4 km/min
11. Two cars are moving with the same speed. The velocity of both cars will be the same if the cars
are moving in: (4 points)
a. circles.
b. opposite directions.
c. straight lines.

meters
d. the same direction. Correct
14
12
Position vs. Time
10
8
6
4
2
0
0 50 100 150 200 250 300
seconds
12. Which motion diagram below corresponds to the position vs. time graph above? (circle all that
apply) Both A and D could be correct. There are no scales on the motion diagram, so
either one could be correct. B and C show a change in speed and there is no change in
speed on the graph.
13. Circle all the vectors in the following list:
a. 5 m scalar
b. 30 m/sec, East vector
c. 5 mi., North vector

meters
d. 20 degrees Celsius scalar
e. 256 bytes scalar
f. 4000 Calories scalar
35.0
Position vs. Time
30.0
25.0
20.0
15.0
10.0
Student 1
Student 2
Student 3
Student 4
5.0
0.0
0.0 10.0 20.0 30.0 40.0 50.0 60.0
seconds
14. Which student on the above graph shows the highest average speed for the entire race
(48 seconds)?
1 2 3 4
Student 1 has the steepest slope.
15. Which student was farthest from the origin at the beginning (time = 0.0s)?
1 2 3 4
Student 4 was 30m from the origin at the beginning.
16. Which student on the above graph is moving backwards (moving closer to the origin)?
1 2 3 4
Student 4 has a negative slope and is getting closer to the origin.
17. At what time did student 1 and student 4 meet?

meters
a. 0.0s
b. 30.0s
c. 32s
d. 48s
e. They don’t meet.
f. You can’t tell from the data.
C is the best answer. The two students at the same distance from the origin at 34s.
18. Why was it important to use layers for building your paper tower?
Layers give more strength and allow you to build higher.
19. If you were allowed to use 50 sheets of paper, how could you have built a taller tower?
Answers will vary, but you should be able to build a stronger and wider base so you could add
layers. Think about it. You could come up with at least three different things you could do.
18
16
14
12
10
Position vs. Time
A
B
8
6
4
2
0
0 50 100 150 200 250 300
seconds
20. Will the two objects in the position vs. time graph above meet? If so, when?
They will meet at 100 seconds. You can tell because that is where the graphs intersect or the
two are at the same position at the same time.

meters
10
9
8
7
6
5
4
3
2
1
0
Position vs. Time
0 5 10 15 20 25
seconds
21. For the position vs. time graph above, how far does the object move between 5 and 10 seconds?
At t=5seconds dist=2 meters. At 10 seconds d=4 meters. Total distance = 4m-2m = 2m
22. Which motion diagrams (particle model) below, show an object slowing down?
C. the distance is decreasing for every equal time interval.
23. From a position vs. time graph how can you find the average velocity between two times?
You find the slope of the line drawn between the two points on the best fit line at the times
indicated.

24. If the average speed of a drag racing car is 0.069 miles per second, how long would it take the car
to complete a 1/4 mile (0.25 mile) straight track?
a. 0.020 seconds
b. 0.28 seconds
c. 3.6 seconds Correct .25mi / 0.69 mi/s = 3.6s
d. 3.5 hours
25. A steeper line on a position vs. time graph means:
a. a slower speed.
b. a constant speed.
c. a faster speed. (a faster speed)
d. instantaneous speed.
26. Which point on this position vs. time graph has the fastest speed?
a. Point 1
b. Point 2 (steepest slope = a faster speed or shortest time for longest
distance)
c. Point 3
d. Point 4
27. From the reading, which axis is the independent variable usually plotted?
a. Vertical
b. Horizontal Correct
c. It doesn’t matter.
d. There is no independent variable on a graph.

28. Using the following data, make a proper graph in the grid below. Please ensure it is proper in all
manners.
Distance in
cm
Time in
Seconds
0 0
0.28 5
0.84 15
1.12 20
1.4 25
1.96 35
2.24 40
2.8 50