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9th Class Physics Chapter 5 Gracitation English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

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

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100 N

160 N

1000 N

1600 N

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Question # 2

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

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Question # 3

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

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Question # 4

The Mars has value of g

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25.94 m/sec2

3.73 m/sec2

1.62 m/sec2

8.87 m/sec2

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Question # 5

GPS consists of __________ earth satellites.

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Question # 6

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

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Question # 7

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

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Question # 8

The value of g is maximum at:

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Mountains

Maximum height

Surface of earth

At 2R

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Question # 9

S.I unit of G is:

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Nm^-2 kg²

Nm^-2Kg^-2

Nm²kg^-2

Nm²kg^-3

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Question # 10

A satellite revolving around very close to Earth has speed nearly:

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8 kms^-1

5 kms^-1

10 kms^-1

100 kms^-1

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Question # 11

Moon is ____ satellite.

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Natural

Communications

Artificial

Geostationary

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Question # 12

The velocity of geostationary satellites with respect to Earth is

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2Vo

Zero

1/2 Vo

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Question # 13

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

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