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Explain why a Rolly doll always stands e...

Explain why a Rolly doll always stands erect

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PEARSON IIT JEE FOUNDATION-DYNAMICS-Level 2
  1. A system of pulleys is used to lift a load of 1000 kg(wt). If the effi...

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  2. Explain why we take short steps while walking on slippery surfaces.

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  3. Explain how winnowing allows the grain to get separated from the husk.

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  4. A crowbar is of length 3 m. Where should the fulcrum be placed along t...

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  5. A bullet of mass 50 g is fired from a gun. If the bullet acquires a ve...

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  6. Explain which of Newton's laws of motion are applicable in the followi...

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  7. A person, sitting in a car, tries to move the car by applying force to...

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  8. Give an example where low inertia is preferred and an example where hi...

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  9. Calculate the density of a cubical ice block of side 50 cm if a force ...

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  10. Explain why a Rolly doll always stands erect

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  11. An athelete runs a certain distance before taking a long jump . Why ?

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  12. Find the magnitude of the foce applied to a block of mass 5 kg at rest...

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  13. A clean hole is made in a glass window pane when it is struck by a bul...

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  14. A car of mass 1000 kg is moving with a certain speed when a constant b...

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  15. A car changes its speed from 20 km h^(-1) to 50 km h^(-1) of mass 3600...

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  16. Two forces having magnitudes 3F and 2F, when act in the same direction...

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  17. If a force of 50 N is applied on a body and it is still at rest, then ...

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  18. Find the energy possessed by a bird of 5 kg moving at a constant heigh...

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  19. A brick measures 12 cm xx 6 cm xx 3 cm. Initially, it is kept on the g...

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  20. Two spheres of mass 10 g and 100 g each falls on the two pans of a tab...

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