Physics MCQs for Class 9 with Answers Chapter 4

Gravitational force is a:

Electric force

Magnetic force

Reactional force

Electromotive force.

Newton’s law of gravitation resembles with

1st law of motion

2nd law of motion

3rd law of motion

Law of gravitation

The orbital speed of a low orbit satellite is

Zero

8 ms-1

800 ms-1

8000 ms-1

The radius R of the earth is:

6 x 1018 m

6.4 x 106m

6.4 x 108m

6.4 x 1012m

The speed geostationary satellite with respect to earth is:

8.33 kms-1

3.87 ms-1

32 ms-1

Zero

The value of g at a height one Earth’s radius above the surface of the earth is:

2g

1/2 g

1/3 g

1/4 g

The gravitational force has the ________ relation with the distance between two masses:

Direct

Inverse

Constant

None

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

Mass

Weight

Charge

Radius

The earth also completes its one revolution about its axis in.

1 Hours

6 Hours

13 Hours

24 Hours

Speed of the satellites of GPS around earth is:

3.87 ms-1

387 kms-1

3.87 kms-1

38.7 kms-1