CBSE Class 9 Gravitation Notes

Scroll down for PDF

CBSE Class 9 Gravitation Notes. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations.

Chapter 10

Gravitation Points to remember

Key Learning:

1. According to the law of gravitation the force of attraction between any two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them. The law applies to objects anywhere in the universe. Such a law is said to be universal.

2. Universal gravitational constant G = 6.673×10-11Nm2kg-2 

3. Gravitation is a weak force unless large masses are involved.

4. Acceleration with which a body falls towards the centre of the earth is called acceleration due to gravity (g).

5. The force of gravity decreases with altitude. It also varies on the surface of the earth, decreasing from poles to the equator.

6. Mass is the quantity of matter contained in the body.

7. Weight of the body is the force with which the earth attracts the body.

8. The weight is equal to the product of mass and acceleration due to gravity.

9. Mass of a body does not change but weight of a body is different at different places.

10. The force acting on a body perpendicular to its surface is called thrust.

11. The force acting per unit area of the object is known as pressure.

12. The upward force exerted by a liquid when a body is immersed in the liquid is called up thrust or buoyant force.

13. Objects having density less than that of the liquid in which they are immersed, float on the surface of the liquid. If the density of the object is more than the density of the liquid in which it is immersed then it sinks in the liquid.

14. According to Archimedes’ principle, when a body is partially or fully immersed in a fluid, it experiences an up thrust which is equal to the weight of the fluid displaced by the body.  

Top Formulae:

1. Newton’s Law of gravitation F= G m´M/R2

2. Acceleration due to gravity –g= GME/RE2

3. Equations of motion under free fall

i. v = u + gt

ii. s = u t + (½) g t2

iii. v2 = u2 + 2 g s

4. Weight of an object W = m g

5. Pressure = thrust / area 6. Density = mass / volume

7. Relative density = density of a substance / density of water 

Please click the link below to download pdf file for CBSE Class 9 Gravitation Notes.

Tags: 


Click on the text For more study material for Science please click here - Science

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Simple tips to Excel in Examinations

We are entering the last quarter of the Academic Session. With examinations just around the corner, I am sure all of us are carrying a mixed bag of Stress, Excitement, and Anxieties!! So, first and foremost- Let’s be Positive and Futuristic! It’s most important to...

CBSE Board Exam Date Sheet of class 10th and 12th

The Central Board of Secondary Education (CBSE) released the Date sheet of Class 10 and Class 12th 2020 examination on the official website cbse.nic.in. The board examination of Class 12 will be conducted from 15 February to 30 March 2020, while the board examination...

CBSE Counseling for Board exam 2020 starts today

The 23rd psychological Counseling starts 1st February (today) for The Class10 and Class12 CBSE students and their parents, by the Central Board of Secondary Education (CBSE).    This Counseling service is cost-free and this counseling service will be available every...

×
Studies Today