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A man of mass 70 kg stands on a weighing...

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- downwards with a uniform acceleration of `5 m s^-2`,

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A man of mass 70 kg stands on a weighing scale in a lift which is moving :- upwards with a uniform acceleration of 5 m s^-2 . What would be the readings on the scale in each case?

A man of mass 60 kg stands on a weighing machine in a lift which is moving downwards with a uniform acceleration 2 m s^-2 . What would be the reading of machine?

A man weighs 70 kg. He stands on a weighing scale in a lift which is moving? upwards with a uniform acceleration of 5 ms^-2 .

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- upwards with a uniform speed of 10 m s^-1 , what would be the reading on scale?

A man weighs 80 kg. He stands on a weighing scale in the lift, which is moving upward with a uniform acceleration of 5 ms^-2 what whould be the reading on the scale? (g = 10 m//s^2) .

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- What would be the reading if the lift mechanism failed and it hurtled down freely under gravity ?

A monkey of mass 40kg climbs on a rope (Fig. 5.20) which can stand a maximum tension of 600 N. in which of the following cases will the rope break: the monkey:- climbs down with an acceleration of 4 m s^-2

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with an uniform speed of 7 m s^-1 . It hits the floor of the elevator (length of the elevator = 3 m) and does not rebound. What is the heat produced by the impact ? Would your answer be different if the elevator were stationary ?

PSEB-Laws of Motion-Exercise
  1. A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m l...

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  2. A man of mass 70 kg stands on a weighing scale in a lift which is movi...

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  3. A man of mass 70 kg stands on a weighing scale in a lift which is movi...

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  4. A man of mass 70 kg stands on a weighing scale in a lift which is movi...

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  5. A man of mass 70 kg stands on a weighing scale in a lift which is movi...

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  6. Figure shows the position-time graph of a particle of mass 4 kg. What...

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  7. Figure shows the position-time graph of a particle of mass 4 kg. What ...

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  8. Two bodies of masses 10 kg and 20 kg respectively kept on a smooth, ho...

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  9. Two bodies of masses 10 kg and 20 kg respectively kept on a smooth, ho...

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  10. Two masses 8 kg and 12 kg are connected at the two ends of a light ine...

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  11. A nucleus is at rest in the laboratory frame of reference. Show that i...

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  12. Two billiard balls each of mass 0.05 kg moving in opposite directions ...

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  13. A shell of mass 0.020 kg is fired by a gun of mass 100 kg. If the muzz...

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  14. A batsman deflects a ball by an angle of 45^@ without changing its ini...

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  15. A stone of mass 0.25 kg tied to the end of a string is whirled round i...

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  16. If, in Exercise 5.21, the speed of the stone is increased beyond the m...

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  17. If, in Exercise 5.21, the speed of the stone is increased beyond the m...

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  18. If, in Exercise 5.21, the speed of the stone is increased beyond the m...

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  19. Explain why:- a horse cannot pull a cart and run in empty space.

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  20. Explain why:- passengers are thrown forward from their seats when a sp...

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