Physics

General

Easy

Question

# A particle falls towards earth from infinity. It's velocity reaching the earth would be……

- Infinity
- 2
- Zero

## The correct answer is:

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### Escape velocity of a body of 1 kg. on a planet is 100ms^{-1} . Gravitational potential energy of the body at the planet is =.....j

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### A rocket is launched with velocity 10. If radius of earth is R then maximum height attained by it will be =…….

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### If P= where percentage error in and are respectively and then total percentage error in measurement of

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### The mass of the earth is 6.00 Kg and that of the moon is 7.40 kg. The constant of gravitation G=6.667Nm^{-2} kg^{--2}.The potential energy of the system is -7.79 Joules. the mean distance between the earth and moon is =

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