Free Printable 9th CBSE Gravitation

Worksheets

9th CBSE Gravitation

Total questions: 20

Worksheet time: 12mins

Name

Class

Date

Gravitation is the force of ________________

attraction

repulsion

both

none

What is the value of G?

6.67X 10^-11

6.80X10¹²

7.97X10^-10

NONE

What is the SI unit of G?

Nm²/kg

Nm²/kg²

unitless

none

Gravity is the phenomenon between

Earth and moon

Earth and you

Earth and any object

none

If a big stone and a small stone when dropped from a height, then both will strike the ground at the same time bcoz :

the value of g does not depend of mass of object

the value of g depends on mass of object

both a and b

none

What is the difference between mass and weight ?( multiple select)

Mass of an object is the quantity of matter contained in it whereas weight of an object is the force with which it is attracted towards the centre of earth

Mass is a vector and weight is scalar

Mass is constant whereas weight is not

SI unit of mass is Kg and SI unit of weight is Newton

What is the mass of an object whose weight is 49 N?

5 kg

6kg

7kg

10kg

X = $\frac{Density\ of\ subs\tan ce}{Density\ of\ water\ at\ 4\ ^0C}$ ,What is X here?

Density

Relative density

Mass

None

A ship uses which principle:

newton's law

archimedes

both a and b

none

10.

How is the gravitational force between to objects related to their mass

They are directly proportional

They are inversely proportional

They do not affect each other

They are equal

11.

There is a car moves in a circle. Which of the following can explain the above situation?

There is a force acts in opposite direction with car's weight.

There is a force acts as centripetal force towards the centre of circle.

There is a force acts in the direction of movement.

There is a force acts away from the centre of circle.

12.

The gravitational force in the previous interaction was 20 N. Determine the gravitational force in the new situation where the second mass is doubled.

10 N

20 N

40 N

80 N

13.

Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun:

deviation of the falling bodies towards east

revolution of earth around the sun

phenomena of day and night

apparent motion of sun round the earth

14.

If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would:

Decrease by 2%

Remain unchanged

Increase by 2%

Increase by 1%

15.

Where will it be profitable to purchase 1 kg sugar (by spring balance)

At poles

At equator

At 45° latitude

At 60°latitude

16.

A stone is released from the top of a tower of height 19.6 m. Then its final velocity just before touching the ground will be:

384.16 m/ s

196 m/s

19.6 m/s

3841.4 m/s

17.

A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will

Continue to move with velocity v along the original orbit

Move with a velocity v, tangentially to the original orbit

Fall down with increasing velocity

Ultimately come to rest somewhere on the original orbit

18.

which are the following is Newton’s Law of gravitation ?

$W=\frac{GMm}{r}$

$F\ =\frac{GMm}{r^2}$

$V\ =\sqrt{\frac{GM}{r}}$

$g=-\ \frac{GM}{r}$

19.

What is h?

is the altitude or height of the satellite from the surface of the planet

radius of the planet

radius of the satellite

distance of the two objects from their center

20.

The acceleration due to gravity at pole and equator can be related as:

g_p < g_e

g_p = g_e = g

g_p < g_e = g

g_p > g_e

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9th CBSE Gravitation

Total questions: 20

Worksheet time: 12mins

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