All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 01>Q 2

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9th CBSE

IMPORTANT

Earn 100

What are the numerical value and SI unit of $G$ ?

Important Questions on Gravitation

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IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 01>Q 3

What is the force of gravity between the earth and the mass of

20 k g

placed on its surface? (Given,

g = 9.8 \frac{m}{s^{2}}

)

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9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 01>Q 4

Name the source of centripetal force that the moon requires to revolve around the earth.

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All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 01>Q 5

If the distance between masses of two objects is increased by five times, by what factor would the mass of one of them have to be changed to maintain the same gravitational force? Would there be an increase or a decrease in the same?

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All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 02>Q 1

State Kepler’s first law of planetary motion.

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IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 02>Q 2

What is the difference between perihelion and aphelion.

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All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 02>Q 3

The distance of a planet from the sun is

40

times that of the earth. What is the ratio of their time periods of revolution around the sun?

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All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 02>Q 4

Suppose a planet exists whose mass and radius both are half that of the earth. The acceleration due to gravity on the surface of this planet will be double? Justify.

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All In One SCIENCE CBSE Class IX>Chapter 10 - Gravitation>Check Point 02>Q 5

Acceleration due to gravity of the earth is less at the equator than at poles. Why?