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Scalars and vectors

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-PS2-1 · England: GCSE Combined Science: Forces (scalar and vector quantities)

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  1. Question 1

    Is speed a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

  2. Question 2

    Which statement uses "velocity" correctly?

    • A. The plane's velocity was north
    • B. The plane's velocity was 3 hours
    • C. The plane flew at 250 m/s due north
    • D. The plane's velocity was 250 m/s

  3. Question 3

    A dog runs 50 m east, then 30 m west. What total distance does it run, in m?

    Answerm

  4. Question 4

    Is momentum a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

  5. Question 5

    A runner completes one full lap of a 400 m track. What is their displacement?

    • A. 800 m
    • B. 400 m
    • C. 0 m
    • D. 200 m

  6. Question 6

    A dog runs 80 m east, then 90 m west. What is the size of its displacement from the start, in m?

    Answerm

  7. Question 7

    Is displacement a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

  8. Question 8

    Which statement uses "velocity" correctly?

    • A. The plane flew at 250 m/s due north
    • B. The plane's velocity was 250 m/s
    • C. The plane's velocity was north
    • D. The plane's velocity was 3 hours

  9. Question 9

    A dog runs 50 m east, then 70 m west. What is the size of its displacement from the start, in m?

    Answerm

  10. Question 10

    Is distance a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

  11. Question 11

    A car drives round a roundabout at a steady 20 km/h. Is its velocity constant?

    • A. No: its speed keeps changing
    • B. Yes: velocity has no direction
    • C. No: its direction keeps changing, so its velocity changes
    • D. Yes: the speed is constant

  12. Question 12

    A dog runs 20 m east, then 30 m west. What total distance does it run, in m?

    Answerm

  13. Question 13

    Is time a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

  14. Question 14

    A ball is thrown up at 10 m/s and later falls back past the same point at 10 m/s. Has its velocity changed?

    • A. No: the speed is the same
    • B. Yes: the ball is heavier on the way down
    • C. Yes: the speed is the same but the direction is reversed
    • D. No: velocity is a scalar

  15. Question 15

    A dog runs 30 m east, then 90 m west. What is the size of its displacement from the start, in m?

    Answerm

  16. Question 16

    Is acceleration a scalar or a vector quantity?

    • A. scalar (size only)
    • B. vector (size and direction)

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Answer key: Scalars and vectors

  1. 1. A. scalar (size only)

  2. 2. C. The plane flew at 250 m/s due north

  3. 3. 80 m

  4. 4. B. vector (size and direction)

  5. 5. C. 0 m

  6. 6. 10 m

  7. 7. B. vector (size and direction)

  8. 8. A. The plane flew at 250 m/s due north

  9. 9. 20 m

  10. 10. A. scalar (size only)

  11. 11. C. No: its direction keeps changing, so its velocity changes

  12. 12. 50 m

  13. 13. A. scalar (size only)

  14. 14. C. Yes: the speed is the same but the direction is reversed

  15. 15. 60 m

  16. 16. B. vector (size and direction)