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In which of the following cases the net ...

In which of the following cases the net force in NOT zero?

A

A kite skillfully held stationary in the sky

B

A ball freely falling from a height

C

An aeroplane rising upwards at an angle of `45^@` with the horizontal with a constant speed

D

A cork floating on the surface of water

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MODERN PUBLICATION-FORCE AND LAWS OF MOTION-EXAMPLE
  1. In which of the following cases the net force in NOT zero?

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  2. A motorcycle is moving with a velocity of 90 km//h and it takes 5 seco...

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  3. A cricket ball of mass 0.2 kg moves with a velocity of 20 m/s and is b...

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  4. A constant force of 5N is applied continuously on a body of mass 10kg ...

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  5. A bullet of mass 25 g moving with a speed of 100 m/s pierces a bag ful...

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  6. A bullet of mass 25 g moving with a speed of 100 m/s pierces a bag ful...

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  7. A bullet of mass 25 g moving with a speed of 100 m/s pierces a bag ful...

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  8. A body of mass 25 kg is dragged on a horizontal rough road with a cons...

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  9. The velocity-time graph of a ball moving on a horizontal surface is sh...

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  10. Which would require a greater force-accelerating a 2 kg mass at 5ms^-2...

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  11. A force of 5N gives a mass m(1), an acceleration of 10m//s^(2), and a ...

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  12. A motorcar of mass 1200 kg is moving along a straight line with a unif...

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  13. A constant force acts on object of mass 5 kg for a duration of 2s It i...

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  14. A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves...

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  15. A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves...

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  16. A bullet of mass 10g is fired from a rifle. The bullet takes 0.003 sec...

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  17. Two bodies A and B of mass 5 kg and 10 kg contact with each other rest...

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  18. Two bodies A and B of mass 5 kg and 10 kg contact with each other rest...

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  19. A 40kg skatter moving at 4m/sec eastwards colloid head on with a 60kg ...

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  20. Two bodeis A and B of masses 2.00 kg and 10.0 kg respectively moving i...

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  21. Which of the following has more inertia : rubber ball and a stone of t...

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