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A spaceship is stationed on Mars. How mu...

A spaceship is stationed on Mars. How much energy must be expended on the spaceship to launch it out of the solar system ? Mass of the space ship = 1000 kg, mass of the sun = `2xx10^30 kg`, mass of mars = `6.4xxl0^23 kg`, radius of mars = 3395 km, radius of the orbit of mars = `2.28 `x10^8 km`, G = `6.67xx10^-11 N m^2 kg^-2`.

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A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth’s gravitational influence? Mass of the satellite = 200 kg, mass of the earth = 6.0xxl0^24 kg , radius of the earth = 6.4 xx 10^6 m , G = 6.67 xx 10^11 N m^2kg^2 .

A rocket is fired ‘vertically’ from the surface of mars with a speed of 2 km s^-1. If 20% of its initial energy is lost due to martian atmospheric resistance, how far will the rocket go from the surface of mars before returning to it ? Mass of mars = 6.4xx10^23 kg , radius of mars = 3395 km, G = 6.67xx10^-11 N m^2 kg^-2 .

What is magnitude of gravitational force between the earth and a 1 kg object on its surface ? Take mass of earth to be 6 xx 10^24 kg and radius of the earth is 6.4 xx 10^6 m.G =6.67 xx10^-11nm^2kg^-2 .

The radius of moon is 1.7 xx10^6m and its mass is 7.35xx 10^22 kg . What is the acceleration due to gravity on the surface of moon ? Given G = 6.67 xx 10 ^-11Nm^2//kg^2 .

A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth ? Mass of the earth = 6.0 xx 10^24 kg , mean radius of the earth = 6.4 xx 10^6 m , G = 6.67 xx 10^-11 N m^2kg^-2 .

If mass of Earth is 6xx10^24 kg, radius of Earth is 6.4 xx 10^6m and the gravitational constant is 6.7 xx10^-(11)Nm^2kg(-2) . Calculate the value of g.

A rocket is fired from the earth towards the sun. At what distance from the earth’s centre is the gravitational force on the rocket zero ? Mass of the sun = 2xxl0^30 kg , mass of the earth = 6xxl0^24 kg . Neglect the effect of other planets etc. (orbital radius = 1.5 xx 10^11 m ).

Calculate the force of gravitation between the earth and the sun, given the mass of earth = 6xx 10^24 kg and of the sun = 2 xx10^30 kg . Average distance between the two is 1.5xx 10^10m .

PSEB-GRAVITION-Exercise
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  6. Which of the following symptoms is likely to afflict an astronaut in s...

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  8. How will you ‘weigh the sun’, that is estimate its mass? The mean orbi...

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  9. A saturn year is 29.5 times the earth year. How far is the saturn from...

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  10. A body weighs 63 N on the surface of the earth. What is the gravitatio...

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  11. Assuming the earth to be a sphere of uniform mass density, how much wo...

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  12. A rocket is fired vertically with a speed of 5 km s^-1 from the earth’...

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  13. The escape speed of a projectile on the earth’s surface is 11.2 km s^-...

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  14. A satellite orbits the earth at a height of 400 km above the surface. ...

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  15. Two stars each of one solar mass (= 2xxl0^30 kg) are approaching each ...

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  16. Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0...

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  17. As you have learnt in the text, a geostationary satellite orbits the e...

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  18. A star 2.5 times the mass of the sun and collapsed to a size of 12 km ...

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  19. A spaceship is stationed on Mars. How much energy must be expended on ...

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  20. A rocket is fired ‘vertically’ from the surface of mars with a speed o...

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