Question # 1

The force with which earth attracts a body towards its center is equal to its

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Mass

Weight

Charge

Radius

The mathematical form of law of gravitation is:

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F = GMe m/Re2

F = Gm1m2/r2

F = GMem1/Re2r2

None

The force exerted by earth on moon is :

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2.01× 1020 N

2.01× 1020 Kg

2.01× 1021 N

2.01× 1022 Kg m/s2

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

The value of 'g' on the surface of Mars:

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3.73 ms^-2

1.62 ms^-2

Zero

Constant

The value of gravitational constant is SI unit is

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0.673 x 10-10

6.673 x 10-11

4.32 x 10-9

5.32 x 10-11

Moon is our satellite:

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Artificial

Permanent

Natural

Communication

The value of g increases with the :

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Increase in the mass of the body

Increase in altitude

Decrease in altitude

None of the above

Moon is a _____________ satellite.

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Natural

Artificial

Not manmade

Nil

Moon complete it's one revolution around earth is days:

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22

23

27.3

25

The altitude of geostationary orbits in which communication satellites are launched above the surface of the Earth.

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850 km

1000 km

6400 km

42,300 km

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

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