Class 9 Science Gravitation – Chapter 10 Set 3

Question 1

The mass of the earth is-

Accepted Answer

$6×10^{24}kg$

Answer

$6.4×10^{24}kg$

Answer

$6×10^{10}kg$

Answer

$6×10^{19}kg$

Question 2

The Radius of the earth is

Accepted Answer

$6.4×10^6m$

Answer

$6.4×10^{-6}m$

Answer

$4.6×10^6m$

Answer

$6.4×10^4m$

Question 3

By applying the Universal law of gravitation, the weight of the object on the moon will be

Accepted Answer

$W_m=G\frac{M_m	imes m}{R_m^2}$

Answer

$W_m=\frac{GR_m^2}{M_m	imes m}$

Answer

$W_m=\frac{GM_m	imes R_m^2}{m}$

Answer

Wm=GRm2mMm

Question 4

The Value of acceleration due to growing-

Accepted Answer

Is least on the Equator

Answer

Is the Same on the Equator & poles

Answer

is least on poles

Answer

Increases from pole to the Equato

Question 5

The Value of Quantity ‘G’ in the law of gravitation-

Accepted Answer

Is Independent of the mass and radius of the earth

Answer

Depends on the mass of the earth only

Answer

Depends on the radius of the Earth only

Answer

Depend on both Mass and Radius of the Earth

Question 6

The Atmosphere is held to the earth by-

Accepted Answer

Gravity

Answer

Wind

Answer

Clouds

Answer

Earth Might field

Question 7

Law of gravitation gives the Gravitational force between

Accepted Answer

any two bodies having some mass

Answer

The Earth and a point mass only

Answer

The Earth & Sun only

Answer

Two charged bodies only

Question 8

An Object weighing 5 N in Air, Weighs 45 N a liquid. the Buoyant force experienced by the object is

Accepted Answer

0.5N

Answer

$(5+4.5)N$

Answer

4.5/5N

Answer

5/4.5N

Question 9

The tidal waves in the see are Primarily due to______

Accepted Answer

Gravitational effect of the moon on earth

Answer

atmospheric effect of earth

Answer

Gravitational effect of the mass of earth

Answer

None of the above

Question 10

A packet of 400 g and volume $200 cm^3$ is put in a water tank. The relative density of the packet is

Accepted Answer

2

Answer

200

Answer

4

Answer

400

CHAPTER-10 GRAVITATION (SET-3)

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