Question # 1

Speed of the satellites of GPS around earth is:

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3.87 ms^-1

387 kms^-1

3.87 kms^-1

38.7 kms^-1

The first man who gave the idea of gravity:

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Hero

Einstein

Newton

Faraday

The orbital speed of a low orbit satellite is

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Zero

8 ms-1

800 ms-1

8000 ms-1

Mass of earth is approximately _________

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3.7 x 10²⁴ kg

25.94 kg

6.0 x 10²²kg

6 x 10²⁴kg

Earth's gravitational force of attraction vanishes at:

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6400 km

Infinity

42300 km

1000 km

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

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3.73 ms^-2

1.62 ms^-2

Zero

Constant

Anything that rotates around a planet is called:

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Star

Sun

Moon

Satellite

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

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

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Increase

Decrease

Remain constant

None

Weight of the body is__________ to the gravity force between body and earth:

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Less than

Greater than

Equal

Constant

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

The mass of a body is 1 kg, its mass in deep space is :

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1 Kg

0.5 Kg

0.25 kg

0

The unit of gravitational constnat is:

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Nm² kg

Nm²kg^-2

Nm²kg^-1

N - m²

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