Question

Joy
DA VINCI International School
Subject:
Class : IX
Revision Test on chapter Gravitation
Total marks : 50
Questions 1 to 10 carry 1 mark each.
Questions 11 to 18 carry 3 marks each.
Questions 19 to 22 carry 4 marks each.
“Trust yourself. You know more than you think you do"
1. What is the International System of Units (SI) of Universal Gravitat
and it's value?
2.
Whai do we call the gravitational force between the earth and an
: Define Newton's law of gravitation?
What is the mathematical expression of Newton's law of gravitati
On what parameters the acceleration due to gravity(g) depends?
What will be new acceleration due to gravity of the mass of the e
You have 3 litre bottle and 5 litre bottle. How can you measure
4
ising 3 and 5 litre bottles?
What is the value of 'g' at the centre of the earth?
ow is the weight of an object related to its mass?
hat will be the value of the weight of an object of mass 20kg
th?
ographic data shows that the acceleration due to gravity is
ator of the earth. Now, where will it be profitable to purcha
? Justify your answer.
does the force of gravitation between two objects chan
een them is reduced to half without changing their mas
three differences between acceleration due to gravity
tional constant (G).
e value of gravitational acceleration, when a space
two earth's radius from the centre of the earth.
e equations for motion under gravity for both do
5.
t if a body is thrown vertically upward, the time​

Answer 1

Explanation:

The gravitational force between earth and any object is known as gravity.

...

Difference Between Gravitation and Gravity

It is a universal force It is not a universal force

It is a weak force It is a strong force

The force is F=(GM_{1}M_{2})/R^{2} (G= gravitational constant) The force is F=mg (g=acceleration due to gravity

Answer 2

Answer:

The gravitationalal force between the earth and an object is called the weight of the object. It is also equal to the product of acceleration due to gravity and mass of the object. The weight of any object, w = mg where m is the mass of the object and g is the acceleration due to gravity for the earth (g = 9.8 ms2).