Question # 1

The first man who gave the idea of gravity:

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Hero

Einstein

Newton

Faraday

Mass of earth is Me is :

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Me = 6× 1024 kg

6× 1024 kg

7× 1024 kg

6× 1024 Mg

Weight of the body when we increase its height from earth's surface.

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Increase

Decrease

Remain constant

None

The radius R of the earth is:

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6 x 10¹⁸m

6.4 x 10⁶m

6.4 x 10⁸m

6.4 x 10¹²m

Law of Gravitation is consistence with:

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1st Law of motion

2nd Law of motion

3rd Law of motion

Law of momentum

At the surface of the earth value of 'g' is measured by using formula:

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g=GMe/R

g = GMe/R²

g = 2GMe/R²

g = GMe/2 R

The speed geostationary satellite with respect to earth is:

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8.33 kms^-1

3.87 ms^-1

32 ms^-1

Zero

Earth's gravitational force of attraction vanishes at

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6400 km

Infinity

42300 km

1000 km

The mass of Earth is

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6 x 1018 kg

6 x 1020 kg

6 x 1022 kg

6 x 1024 kg

The altitude of geostationary orbits in which communication satellites are launched above the surface of the earth is;

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850 km

1000 km

6400 km

42300 km

The value of g on moon's surface is 1.6 ms^-2. What will be the weight of a a 100 kg body on the surface of the moon?

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100 N

160 N

1000 N

1600 N

The orbital speed of a low orbit satellite is:

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Zeri

8 ms^-1

800 ms^-1

8000 ms^-1

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