Question # 1

Earth's gravitational force of attraction vanishes at

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6400 km

Infinity

42300 km

1000 km

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

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 unit of gravitational constnat is:

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Nm² kg

Nm²kg^-2

Nm²kg^-1

N - m²

If the distance is doubled between two masses. The gravitational force will decrease:

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4 times

2 times

One forth

One third

GPS system consists of earth satellites:

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4

20

24

30

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 'g' on the surface of moon is:

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1.62 ms^-2

10 ms^-2

20 ms^-2

Zero

The value of gravitational constant "G" is Nm² kg^-2

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6.67 x 10^-21

6.67 x 10^-11

6.67 x 10^-23

6.67 x 10¹¹

The orbital speed of a low orbit satellite is

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Zero

8 ms-1

800 ms-1

8000 ms-1

Moon is nearly _________ km away from earth.

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6 x 10²⁴

380000

199.62 km

30000

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