Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 16

HARD

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IMPORTANT

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The radius of moon is $0.27$ times the radius of earth, whereas $g_{m o o n}$ is $1.27 m s^{- 2}$ and $g_{e a r t h}$ is $9.8 m s^{- 2}$ . The ratio of mass of earth to the mass of moon is:

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Important Questions on Gravitation

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9th CBSE

IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 17

The weight of body on the surface of earth is

90 kgf

. What will be its weight on the surface of another planet of mass

\frac{1}{9} th

the mass of the earth and radius half of the earth?

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IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 18

What will be acceleration due to gravity on the surface of a heavenly body whose mass

{\frac{1}{80}}^{th}

and radius of

{\frac{1}{4}}^{t h}

the earth, when

g_{e a r t h} = 10 m s^{- 2}

.

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Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 19

If the diameter of earth becomes

3

times its present value, but mass does not change, the weight of an object will decrease to :

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IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 20

The value of

‘ g ’

on the top of Mount Everest (height

8848 m

) will be:
(Take radius of earth

6.37 \times 10^{6} m

and

g_{e a r t h} = 9.8 m s^{- 2}

)

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IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 21

A small satellite weighs

630 N

on the surface of earth. How much will it weigh at a height equal to half the radius of the earth.

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IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 22

The radius of earth is

6400 km

. At what height the value of

g

will be

60 %

.

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IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 23

If radius of earth is $R$ , at what height from the surface of earth, the weight of the body becomes half?

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9th CBSE

IMPORTANT

Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 24

A meteor passes near the earth at a height equal to

3

times the radius of earth. If

g

is the acceleration due to gravity on its surface, the acceleration experienced by the meteor in terms of

g

is.