Laws of Motion Book Back Questions

10th Standard EM

    Reg.No. :


Time : 01:00:00 Hrs
Total Marks : 35
    3 x 1 = 3
  1. The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be____kg


    4 M


    2 M





  2. If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will


    decrease by 50%


    increase by 50%


    decrease by 25%


    increase by 300%

  3. To project the rockets which of the following principle(s) is /(are) required?


    Newton’s third law of motion


    Newton’s law of gravitation


    law of conservation of linear momentum


    both a and c

  4. 3 x 1 = 3
  5. By convention, the clockwise moments are taken as ___________ and the anticlockwise moments are taken as__________


    negative and postive

  6. ___________ is used to change the speed of car.



  7. A man of mass 100 kg has a weight of ___________ at the surface of the Earth


    980 N

  8. 4 x 1 = 4
  9. Newton’s I law

  10. (1)

    Flying nature of bird

  11. Newton’s II law

  12. (2)

    stable equilibrium of an object

  13. Newton’s III law

  14. (3)

    propulsion of a rocket

  15. Law of conservation of Linear momentum

  16. (4)

    Law of force

    3 x 2 = 6
  17. Why a spanner with a long handle is preferred to tighten screws in heavy vehicles?

  18. While catching a cricket ball the fielder lowers his hands backwards. Why?

  19. How does an astronaut float in a space shuttle?

  20. 3 x 4 = 12
  21. A ball of mass 1 kg moving with a speed of 10 ms-1 rebounds after a perfect elastic collision with the floor. Calculate the change in linear momentum of the ball.

  22. A mechanic unscrew a nut by applying a force of 140 N with a spanner of length 40 cm. What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?

  23. The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7 Find the ratio of their accelerations due to gravity.

  24. 1 x 7 = 7
  25. What are the types of inertia? Give an example for each type.


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