A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement?
40 metres, South
50 metres, South
50 metres, North
40 metres, North
2. Multiple Choice
45 seconds
1 pt
Which statement describes a vector?
It has magnitude but no direction
It has direction but no magnitude
It has both direction and magnitude
It has constant magnitude but no direction
3. Multiple Choice
30 seconds
1 pt
In practice A of the figure, What is the magnitude of the resultant displacement?
5 km
8 km
11 km
15 km
4. Multiple Choice
2 minutes
1 pt
In practice A of the figure, what is the direction of the resultant displacement?
63 degrees, South of East
63 degrees, North of West
27 degrees, North of West
27 degrees, South of West
5. Multiple Choice
2 minutes
1 pt
In practice B of the figure, which displacement is the horizontal component?
30 km, East
30 km, West
40 km, North
40 km, South
6. Multiple Choice
2 minutes
1 pt
In practice B of the figure, which displacement is the vertical component?
40 km, South
40 km, North
30 km, East
30 km, West
7. Multiple Choice
45 seconds
1 pt
Is this a scalar quantity or a vector quantity? Wind blowing at 20 knots
Scalar
Vector
8. Multiple Choice
30 seconds
1 pt
Is this a scalar quantity or a vector quantity? A deer running 15 meters per second due west
Scalar
Vector
9. Multiple Choice
45 seconds
1 pt
If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?
20m
40m
0m
-20m
10. Multiple Choice
45 seconds
1 pt
What is the Net Force?
5 N to the right
10 N to the right
15 N to the right
0 N
11. Multiple Choice
45 seconds
1 pt
A car moved 60 km East and 90 km West. What is the distance it traveled?
30 km, West
60 km. East
90 km
150 km
12. Multiple Choice
45 seconds
1 pt
If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement?
12 km
19 km, East
31 km
43 km, East
13. Multiple Choice
45 seconds
1 pt
The president’s airplane, Air Force One, flies at 250 m/s to the east with respect to the air. The air is moving at 35 m/s to the north with respect to the ground. Find the velocity of Air Force One with respect to the ground.
252 m/s
222 m/s
435 m/s
125 m/s
14. Multiple Choice
45 seconds
1 pt
A motorboat, which has a speed of 5 meters per second in still water, is headed east as it crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat’s resultant velocity with respect to the starting point?
3.3 m/s
5.0 m/s
6.0 m/s
8.3 m/s
15. Multiple Choice
45 seconds
1 pt
A person observes a fireworks display from a safe distance of 0.750 kilometer. Assuming that sound travels at 340 meters per second in air, what is the time between the person seeing and hearing a fireworks explosion?
0.453 s
2.21 s
410 s
255,000 s
16. Multiple Choice
45 seconds
1 pt
A child walks 5 meters north, then 4 meters east, and finally 2 meters south. What is the magnitude of the resultant displacement of the child after the entire walk?
1.0 m
5.0 m
3.0 m
11.0 m
17. Multiple Choice
45 seconds
1 pt
An airplane traveling north at 220 meters per second encounters a 50.0-meters-per-second crosswind from west to east.
170 m/s
214 m/s
226 m/s
270 m/s
18. Multiple Choice
45 seconds
1 pt
A hiker walks 5 kilometers due north and then 7 kilometers due east.
2 km
8.6 km
12 km
12.6 km
19. Multiple Choice
45 seconds
1 pt
A fishing boat with a maximum speed of 3 m/s relative to the water is in a river that is flowing at 2 m/s. What is the maximum speed the boat can obtain relative to the shore?
5 m/s
25 m/s
5.8 m/s
7 m/s
20. Multiple Choice
45 seconds
1 pt
A fishing boat with a maximum speed of 3 m/s relative to the water is in a river that is flowing at 2 m/s. What is the minimum speed the boat can obtain relative to the shore?
1 m/s
5 m/s
3.6 m/s
4.5 m/s
21. Multiple Choice
45 seconds
1 pt
A motorboat velocity is 20 km/h in still water. If the boat must travel straight to the nearest shore in a river whose current is 12 km/h, What up stream angle must the bow boat point at? (hints: you know the opposite and resultant sides of your right triangle here).
46 degrees upsteam
37 degrees upstream
22 degrees upstream
42 degrees upstream
22. Multiple Choice
45 seconds
1 pt
A plane traveling north at 150 m/s is flying toward a runway. A cross-wind of 30 m/s begins to blow from the east. The pilot realizes he is being blown off course. At what angle must he head in order to travel directly north?