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What is the gravitational field strength...

What is the gravitational field strength of a planet where the weight of a 60kg astronaut is 300N?

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Gravitational field strength is obtained from the acceleration of a planet.
Force = 300N, Mass m = 60 kg
Gravitational field strength
`a=(F)/(m)=(300)/(60)=5Nkg^(-1)`
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  7. Define 'G'. What are the units and dimensions of 'G' ?

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  12. What is 'retrograde motion' of planets?

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  13. On what factors does escape speed depends on?

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  14. Does the escape speed depends on the direction in which object is thro...

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  15. State the important points to be remembered in gravitational field.

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  16. What is meant by superposition of gravitational field?

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  17. State the condition in which gravitational potential energy is said to...

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  18. Why hydrogen an helium are not found in abudance on the Earth's atmosp...

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  19. Derive the expression for gravitational potential energy.

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  20. Why do we have seasons on Earth?

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