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Physics Velocity and Accelleration: Answers 

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1. Q: A car moved 80 km to the South. What is its displacement?

C: 80 km South

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2. Q: A car moved 60 km East and 90 km West. What is the distance?

D: 150 km

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3. Q: A car moved 60 km East and 90 km West. What is the displacement?

A: 30 km West

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4. Q: Average velocity can be calculated by dividing displacement over what?

A: time

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5. Q: What is the average velocity of a car that moved 60km in 3 hours?

B: 20 km/h

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6. Q: What is the average velocity of a car that moved 40 km East and 80 km West in 2 hours?

D: 20 km/h

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7. Q: How far will a car travel in 25 min at 12 m/s?

C: 18 km

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8. Q: How far will a car travel in 2 hours at 20 m/s?

A: 144 km

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9. Q: If car A is at 40 km/h and car B is at 10 km/h in the opposite direction, what is the velocity of the car A relative to the car B?

D: 50 km/h

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10. Q: If you are walking at constant velocity of 8 km/h and a car passed you by at the speed of 30 km/h from behind, what is the car's velocity from your viewpoint?

A: 22 km/h

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11. Q: If car A is at 70 km/h and car B is at 50 km/h in the same direction, what is the velocity of the car A relative to the car B?

B: 20 km/h

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12. Q: If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement?

B: 19 km

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13. Q: Acceleration is the measure of the change in what?

C: velocity

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14. Q: Average acceleration is calculated by:

C: velocity change devided by elapsed time

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15. Q: If a car accelerates from 3 m/s to 12 m/s in 3 seconds, what is the car's average acceleration?

C: 3 m/s2

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16. Q: How long does it take to accelerate an object from rest to 15 m/s if the acceleration was 3 m/s2?

C: 5 s

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17. Q: You started to run at 10 km/h when you left your house and you arrived at school 30 minutes later. Assuming that your average acceleration was 30 km/h2, how fast were you running when you arrived?

C: 25 km/h

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18. Q: Acceleration due to gravity is represented by what symbol?

B: g

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19. Q: What is g?

A: 9.8 m/s2

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20. Q: How long will it take for an apple falling from a 29.4m-tall tree to hit the ground?

C: 2.45 s

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21. Q: How long does it take for a car to change its velocity from 10 m/s to 25 m/s if the acceleration is 5 m/s2?

B: 3 s

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22. Q: If a car has a constant acceleration of 4 m/s2, starting from rest, how fast is it traveling after 5 seconds?

A: 20 m/s2

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23. Q: If a car has a constant acceleration of 4 m/s2, starting from rest, how far has it traveled after 5 seconds?

A: 50 m

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24. Q: If a car has a constant acceleration of 4 m/s2, starting from rest, how far has it traveled by the time it reaches the speed of 40 m/s?

C: 200 m

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25. Q: A car is at velocity of 20 km/h. If the car traveled 120 km in 3 hours at constant acceleration, what is its final velocity?

B: 60 km/h

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26. Q: How long will it take for a falling object to reach 108 m/s if its initial velocity is 10 m/s?

C: 10 s

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27. Q: What is the final velocity of an apple if it falls from a 100m-tree?

B: 44.3 m/s

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28. Q: What is the displacement of a car whose initial velocity is 5 m/s and then accelerated 2 m/s2 for 10 seconds?

A: 150 m

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29. Q: What is the final velocity of a car that accelerated 10 m/s2 from rest and traveled 180m?

D: 60 m/s

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30. Q: If a car accelerated from 5 m/s to 25 m/s in 10 seconds, how far will it travel?

B: 150 m

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