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The sun rotates round itself once in 27 ...

The sun rotates round itself once in 27 days. What will be period of revolution if the sun were to expand to twice its present radius? Assume the sun to be a sphere of uniform density.

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SL ARORA-System of particles & rotational Motion-EXERCISE
  1. If 2 kg mass is rotating on a circular path of radius 0.8 m with angul...

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  2. A ball tied to a string takes us to complete revolution along a horizo...

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  3. The sun rotates round itself once in 27 days. What will be period of r...

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  4. If the earth suddenly contracts by one-fourth of its present radius, b...

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  5. Prove that for an earth satellite, the ratio of its velocity at apogee...

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  6. A uniform disc rotating freely about a vertical axis makes 90 rpm. A s...

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  7. The separation between C and O atoms in CO is 1.2 A. The distance of c...

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  8. Three masses of 2 kg, 4 kg and 4 kg are placed at the three points (1,...

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  9. Four particles of mass 2 kg, 3kg, 4 kg and 8 kg are situated at the co...

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  10. The centre of mass of a solid cone along the line form the center of t...

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  11. The reduce mass of two particles having masses m and 2 m is

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  12. Consider a sytem of two particles having masses m(1) and m(2). If the ...

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  13. Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s an...

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  14. In a bicycle the radius of rear wheel is twice the radius of front whe...

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  15. Two particles A and B initially at rest, move towards each other by mu...

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  16. 2 bodies of different masses of 2 kg and 4 kg are moving with velociti...

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  17. Two racing cars of masses m and 4m are moving in circles of radii r an...

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  18. Two wheels having radii in the ratio 1 : 3 are connected by a common b...

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  19. A disc, initially at rest, starts rotating about its own axis/ with a ...

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  20. A car is moving at a speed of 72 km//h. The diameter of its wheels is ...

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