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A hippopotamus and a frog are to be proj...

A hippopotamus and a frog are to be projected out of Earth into space. Do we need different velocities to do so?

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The escape velocity, `v_(e)=sqrt(2gR)`, does not depend upon the mass of the projected body. Thus we need the same velocity to project a hippopotamus and frog into space.
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  2. Why does an astronaut in a spacecraft feel weightlessness?

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  3. Where does the weight of a body become zero?

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  4. Why a body weighs less at the equator than at the poles?

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  5. Where does a body weigh less? At the sea level or on the mountains?

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  6. Why do you feel giddy while moving on Raatinam (or) Carrousel?

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  9. If Earth be at one fourth its present distance from the Sun, how many ...

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  10. Why is Newton's law of gravitation called a universal law?

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  11. Why does the gravitational potential energy U(r) is always negative?

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  12. What happens to the acceleration due to gravity on account of rotation...

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  13. Under what condition, the gravitational potential energy of a body wil...

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  14. Can we determine the gravitational mass of a body inside an artificial...

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  15. Mention the factors which determine whether a planet would have an atm...

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  16. If the Earth stops rotating about its axis, then by what value will th...

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  17. A hippopotamus and a frog are to be projected out of Earth into space....

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  18. Tides arise in the ocean. Give reason.

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  19. How does an astronaut float in a space shuttle ?

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  20. Where does the weight of a body become zero?

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