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Is Newton's second law (F=Ma) always val...

Is Newton's second law `(F=Ma)` always valid. Give an example in support of your answer.

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MODERN PUBLICATION-Force-Exercise
  1. A bullet fired from a rifle is more dangerous than an air molecule hi...

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  2. How does Newton's first law of motion leads to the definition of force...

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  3. Is Newton's second law (F=Ma) always valid. Give an example in support...

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  4. The rate of change of momentum of a body is 5 kg ms^(-1). What is the ...

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  5. Give and state SI unit of force.

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  6. What is the difference between mN and nm ?

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  7. Action and reaction forces do not balance each other. Why?

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  8. What is impulsive force?

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  9. What is the net force on a cork floating on water?

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  10. Which is greater-the attraction of 10 kg mass for earth or the earth's...

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  11. A body is moving along a circular path such that its speed always rema...

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  12. State principle of conservation of momentum.

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  13. What is an impulse? How is it related to the change in momentum?

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  14. Can a body remain in state of rest, when external forces are acting on...

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  15. A body is acted upon by a number of external forces. Can it remain at ...

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  16. If net force acting on a body is zero, then will the body remain neces...

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  17. Name physical situation, where the mass of body changes with time.

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  18. When are the two bodies said to posses equal masses ?

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  19. Is a bus moving along a circular track, an inertia frame of reference ...

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  20. what can be said about the motion of the vehicle if a plumb line hangi...

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