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Name the principal on which a rocket wor...

Name the principal on which a rocket works.

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LAKHMIR SINGH & MANJIT KAUR-FORCE AND LAWS OF MOTION-Exercise
  1. Name the physical quantity whose unit is 'newton.

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  2. Which physical principal is involved in the working of a jet aeroplane...

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  3. Name the principal on which a rocket works.

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  4. Is the following statement true or false : A rocket can propel itsel...

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  5. What is the force which produces an acceleration of 1 m/s^(2) in a bod...

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  6. Find the acceleration produced by a force of 5 N acting on a mass of 1...

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  7. A girl weighing 25 kg stands on the floor. She exerts a downward force...

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  8. Name the physical quantity which makes it easier to accelerate a small...

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  9. Fill in the following blanks with suitable words: (a) To every actio...

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  10. Explain the meaning of the following equation : F=mxxa where symbo...

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  11. To take the boat away from the bank of a river, the boatman pushes the...

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  12. Why does a gunman get a jerk on firing a bullet?

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  13. If action is always equal to the reaction, explain how a horse can pul...

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  14. Name the principal on which a rocket works.

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  15. Do action and reaction act on the same body or different bodies ? How ...

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  16. If a man jumps out from a boat, the boat moves backwards. Why?

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  17. Why is it difficult to walk on a slippery road?

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  18. Explain why , a runner presses the ground with his feet before he star...

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  19. A 60 g bullet fired from a 5 kg gun leaves with a speed of 500 m/s. Fi...

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  20. A 10 g bullet travelling at 200 m/s strikes and remains embedded in a ...

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