Force: class 10 Science notes and exercise - chapter 1

Unit 1

          Chapter: force 

 Force : Class 10 Science - If you are searching for the class 10 science notes of Force for your best performance in the SEE examination and to complete your notes? If yes, so do not worry because, in this post, I am going to share with you the class 10 science notes on force  chapter 1

Here we have covered up the complete Notes and Exercise of Class 10 Science "Force" including all the exercises given in the force numericals, give reason, diagrammatic questions and define the following.

This note is published to help students to solve their problems. 

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Unit 1: Numerical 

Unit 2: pressure 

Unit 3: Energy 

Unit 4: Heat

2. Answer the following questions:

a. What is gravitation? What are the factors that affect gravitation? Write the SI unit of gravitation.

b. State Newton's Universal Law of gravitation.

c. What will happen to the gravitational force between two bodies if the distance between them is halved keeping their masses constant?

d. What will be the gravitational force between two heavenly bodies if the masses of both are keeping the distance between two constant?

e. What will be the gravitational force between two bodies if the masses of each is doubled and the distance between is halved?

f. Define G. Also write its value and SI unit.

g. In this formula, g = GM / (R ^ 2) what do G,M and R stands for? Prove that ga 1/R2.

h. What will be the effect on the acceleration due to gravity of the earth if it is compressed to a size of the moon?

i. The acceleration due to gravity of Jupiter is 25 m/s². What does it mean?

j. A Coin and a feather dropped in Vaccum. Which one will reach the ground first? Why?

k. Where does a body have more weight at the pole or at the equator of the earth? Explain with reason.

L. When an apple falls towards the earth, the earth moves up to meet the apple. Is this true? If yes, why is the earth's motion not noticeable?

n. An astronaut is said to be weightless when he travels in a satellite. Does it mean that the hearth does not attract him?

o. What is the importance of gravitational force? Write any two points.

p. What is freefall? What happens to the weight of a body when it is falling freely under the action of gravity?

q. What is the effect of gravity on a falling object? Write the conclusion obtained from the coin and feather experiment.

r. Write the differences between the fall of a Parachute on the earth and its fall on the moon? On what condition does a body have free fall?

s. Write any two examples of weightlessness.

t. Define:

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 3. Distinguish between:

a. Gravity and gravitation

Ans: The differences between gravity and gravitation are as follows:

                        Gravity vs Gravitation 

b. Gravity and acceleration due to gravity

Ans: The difference between gravity and acceleration due to gravity are as follows:

c. Mass and Weight

Ans: The differences between mass and weight are as follows:

d. g and G

Ans: The differences between acceleration due to gravity (g) and Universal gravitational Constant (G) are as follows:

e. Free fall and Weightlessness

Ans: The differences between freefall and weightlessness are as follows:

f. Gravitational force and acceleration due to gravity.

Ans: The differences between gravitational force and acceleration due to gravity are as follows:

g. Weightlessness in space and weightlessness on the earth

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