A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s acceleration?
0.17
1.67
6
7
2. Multiple Choice
5 minutes
1 pt
A car accelerates at 2 m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 16 m/s?
4 s
8 s
16 s
1/16 s
3. Multiple Choice
5 minutes
1 pt
What is the average speed of a car that travels 35 meters in 12 seconds?
None
3.1 m/s
35 m/s
2.9m/s
4. Multiple Choice
5 minutes
1 pt
How long will it take a running horse to travel 260 m and attain a speed of 12 m/s from rest?
1200 seconds
1.2 hours
43 Hours
43 minutes
5. Multiple Choice
5 minutes
1 pt
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops?
4.20 m
52.5 m
105 m
158 m
6. Multiple Choice
30 seconds
1 pt
The SI unit for length or distance is
foot (ft)
inch (in)
mile (mi)
meter (m)
7. Multiple Choice
30 seconds
1 pt
The SI unit for time is
second (s)
minute (min)
hour (hr)
year (yr)
8. Multiple Choice
30 seconds
1 pt
What is the SI unit for acceleration?
m/s
m
m/s2
s
9. Multiple Choice
30 seconds
1 pt
What is the SI unit for speed and velocity?
Km
s
m/s
m/s2
10. Multiple Choice
15 minutes
1 pt
In each of the following cases, determine which car has the greatest acceleration.
starts from 0 m/s to 20 m/s in 4 seconds.
speed up from 20m/s to 40m/s in 3 seconds
slow down from 50m/s to stop in 2 seconds
starts from 0 m/s to 20m/s in 5 seconds
11. Multiple Choice
5 minutes
1 pt
A car accelerates from a standstill to 70 m/s in 10 seconds. What is the acceleration?
0.7m/s2
7m/s2
14m/s2
none of the above
12. Multiple Choice
5 minutes
1 pt
A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?
24 m/s2
18 m/s2
16 m/s2
16 m/s
13. Multiple Choice
5 minutes
1 pt
A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s2, what is its velocity after 2 s?
0 m/s
0.5 m/s
1 m/s
1.5 m/s
14. Multiple Choice
1.5 minutes
1 pt
A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds. What is the dog's acceleration?
-7.5 m/s
-7.5 m/s2
-0.5 m/s2
7.5 mi//hr
15. Multiple Choice
5 minutes
1 pt
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops?
4.20 m
52.5 m
105 m
158 m
16. Multiple Choice
5 minutes
1 pt
A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?
1.3 m/s2
2.5 m/s2
3.0 m/s2
7.5 m/s2
17. Multiple Choice
5 minutes
1 pt
An object with an initial velocity of 3.50 m/s moves east along a straight and level path. The object then undergoes a constant acceleration of 1.80 m/s2 east for a period of 5.00 s. How far does the object move while it is accelerating?
6.30 m
17.5 m
27.2 m
40.0 m
18. Multiple Choice
30 seconds
1 pt
A heavy object and a light object are dropped from the same height. Which will hit the ground first?
Heavier object
Lighter object
Both
19. Multiple Choice
5 minutes
1 pt
If a car is traveling forward at 15 m/s, how fast will it be going in 1.2 seconds if the acceleration is -10 m/s2?
27 m/s
3 m/s
-27 m/s
-3 m/s
20. Multiple Choice
1.5 minutes
1 pt
How much time would it take for an object to fall 4.7 meters?
0.959 s
4.79 s
0.979 s
21. Multiple Choice
5 minutes
1 pt
An object falls for 3.5 seconds. What distance does it travel as it falls?
120.05 m
17.15 m
60.03 m
34.3 m
22. Multiple Choice
5 minutes
1 pt
A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:
6m/s
30m/s
60m/s
300m/s
23. Multiple Choice
5 minutes
1 pt
An airplane lands on a runway with a velocity of 150 m/s. How far will it travel until it stops if its rate of deceleration is constant at -3 m/s2?
525 m
3750 m
6235 m
9813 m
24. Multiple Choice
5 minutes
1 pt
A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be: