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9th Standard Science Chapter 2 Motion Important Question Paper

Motion Important Questions

9th Standard

    Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5

  1. Slope of the velocity - time graph gives

    (a)

    speed

    (b)

    displacement

    (c)

    distance

    (d)

    acceleration

  2. Unit of acceleration is

    (a)

    ms-1

    (b)

    ms-2

    (c)

    ms

    (d)

    ms2

  3. The force responsible for drying of clothes in a washing machine is

    (a)

    Centripetal force

    (b)

    Centrifugal force

    (c)

    Gravitational force

    (d)

    Electrostatic force

  4. In a 100 m race, the winner takes 10 s to reach the finishing point. The average speed of the winner is ___________ ms-1.

    (a)

    5

    (b)

    10

    (c)

    20

    (d)

    40

  5. Speed is never ______

    (a)

    fraction

    (b)

    negative

    (c)

    zero

    (d)

    positive

    6. 5 x 1 = 5

  6. Speed is a ____________ quantity whereas velocity is a ____________ quantity

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      scalar, vector

  7. Consider an object is rest at position x = 20m. Then its displacement – time graph will be straight line to _____________ the axis.

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    Parallel to

  8. Area under velocity ‒ time graph shows ____________

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    magnitude of the displacement

  9. The graph of uniform motion is _____

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    Straight line

  10. Acceleration is a _____ quantity.

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    Vector

    11. 5 x 1 = 5

  11. The motion of a city bus in a heavy traffic road is an example for uniform motion

    (a) True
    (b) False

  12. Distance covered by a particle never becomes zero but displacement becomes zero

    (a) True
    (b) False

  13. If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line?

    (a) True
    (b) False

  14. For a freely falling body the acceleration 'a' is replaced by s.

    (a) True
    (b) False

  15. Giant wheel moves a vertical linear path.

    (a) True
    (b) False
    16. 5 x 1 = 5

  16. Motion of a body covering equal distances in equal interval of time

    17. (1)

  17. Constant retardation

    18. (2)

  18. Uniform acceleration

    19. (3)

    m/s

  19. Speed

    20. (4)

  20. Distance

    21. (5)

    m
    4 x 2 = 8

  21. Define distance.

  22. What is speed?

  23. What is acceleration?

  24. A student takes 15 minutes to travel from his home to school with a uniform speed of 5km/h. What is the distance of his school from the home?

    25. 4 x 3 = 12

  25. An object travels 16m in 4s and then another 16m in 2s. What is the average speed of the object?

  26. Define velocity?

  27. Distinguish distance and displacement.

    28. 2 x 5 = 10

  28. Derive equations of motion by graphical method.

  29. A racing car has a uniform acceleration of 4 ms-2. What distance it covers in 10 s after start?

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