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Learn Free fall, acceleration due to gravity

Imagine dropping a stone from the top of a building. It falls swiftly downward toward the ground, but exactly why does this happen? In the CBSE Class 9 Science curriculum, under the 'Gravitation' chapter, this phenomenon is defined as free fall. An object is said to be in a state of free fall when it moves downward strictly under the influence of the Earth's gravitational pull, with no other external forces acting upon it (not even air resistance, ideally). Interestingly, in a true vacuum free fall, whether you drop a heavy boulder or a light feather, both will fall simultaneously because the gravitational force pulling them down generates the exact same rate of acceleration regardless of their mass.

During a free fall, the object's downward velocity continuously increases, which means it undergoes constant acceleration. This unique acceleration is known as the acceleration due to gravity, represented mathematically by the lowercase letter g. By combining Newton's Second Law of Motion (F = ma) with the Universal Law of Gravitation (F = GMm/r²), we arrive at the core formula: g = GM/R². In this equation, G is the universal gravitational constant, M is the mass of the Earth, and R is the radius of the Earth. Near the surface of our planet, the standard value of g is approximately 9.8 m/s². This means that for every single second an object spends falling freely, its velocity increases by 9.8 meters per second, entirely independent of the object's own mass, m.

Free Fall and Acceleration Due to Gravity (g) Height (h) t = 0 s v = 0 m/s t = 1 s v = 9.8 m/s t = 2 s v = 19.6 m/s g = 9.8 m/s 2 (Constant) Formula for 'g' g = G × M R 2 Notice: 'm' (object mass) is missing! EARTH (Mass = M) R Object (Mass = m)

Let's examine the infographic above to clearly visualize exactly what happens during a free fall scenario. On the left side of the diagram, we see a blue ball dropped from a significant height. At t = 0 s, right before it is released, its initial velocity is exactly zero. As it drops, the constant downward acceleration due to gravity (g) dictates its speed. By t = 1 s, the ball has accelerated to 9.8 m/s, and by t = 2 s, its speed doubles to 19.6 m/s, as highlighted by the growing red velocity vectors. On the right side, the mathematical backbone of this concept is broken down: g = (G × M) / R². Notice how the small mass of the falling object (m) cancels out and does not appear in the final equation. In your CBSE school exams, you will be heavily tested on this concept. You'll frequently need to use the standard equations of motion to find final velocity or time taken during a free fall, simply substituting standard linear acceleration 'a' with 'g' (typically taking 9.8 m/s² or 10 m/s² as instructed).

Mastering classical physics concepts like free fall, universal gravitation, and the associated mathematical derivations is crucial for building a rock-solid foundation in Science. If you find calculating the acceleration due to gravity tricky, or if solving complex numerical word problems feels overwhelming, customized academic support can make a world of difference. Connect with experienced, verified Class 9 Science tutors on the UrbanPro platform today! Whether you prefer focused, one-on-one online sessions or interactive local offline tuition, UrbanPro is your trusted destination to find highly qualified educators who can simplify tough formulas, clear your conceptual doubts, and help you score excellent marks in your CBSE exams.


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Top Tutors who teach Free fall, acceleration due to gravity

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locationImg Kamal Chowk, Nagpur
20 yrs of Exp
Spoken English, MBA, BBA, Career Counselling, Hindi Language tutor with 20 years of experience
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I have 20 years of experience in the field of teaching. I conduct classes for Spoken English, BBA, MBA, Hindi Language, Career Counselling and Classes I to X. I tutor (offline/online) for syllabi-based subjects Classes I to X for CBSE, ICSE, IGCSE, IB Board. For classes X and above, I focus on tutoring subjects like Hindi, English, Psychology. Accountancy, Business Studies, Mathematics, Physics, Chemistry for CBSE, ICSE, IGCSE and IB Board. I also conduct career counselling and psychological counselling. I also assist students in pursuing MBA/PGDBM courses in their dissertation work. People engaged in doctoral theses in the domains of management and psychology engage my services for their research work. Since there is a lot of demand for enhancing one's conversational English, this is what I am focusing on at the moment. Being bilingual, my medium of communication is English as well as Hindi. I train learners in the usage of WordPress, Joomla - to develop their websites; right from domain registration to site maintenance. Besides, I assist teachers in pursuing Teachers' Training Courses.

Also teaches: Hindi Language, MBA Tuition and more

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locationImg Pungavadi Puthur, Tindivanam
14 yrs of Exp 1 student
greenClock 183 hrs of classes completed
rsIcon 300 per hour
Physics teacher with an Engineering background and 14 years of teaching experience
Online Classes Online Classes

I am a highly experienced educator with over 14 years of academic and teaching experience, including 12 years dedicated to undergraduate and postgraduate instruction in physics-based engineering subjects. I have also provided personalised private tuitions for school students, including ICSE 10th standard, with a focus on conceptual clarity and problem-solving. I am currently offering online and home tuition for Physics, especially tailored to high school students. If you're looking for a dedicated, concept-oriented, and motivational tutor who brings both academic depth and real-world applications into lessons, I’d be happy to assist.

Skills: Mathematics , Science

(28)
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locationImg I. P. Extension, Delhi
Less than a yr Exp 1 student
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rsIcon 500 per hour
8+ Years of Helping Students Succeed in Mathematics
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I have taught Class 9 Mathematics with a strong focus on helping students build a clear foundation for higher classes and competitive exams. Since Class 9 introduces many core concepts that continue into Class 10 and Class 11, my teaching approach emphasizes understanding the basics deeply and practicing regularly to gain confidence in problem-solving. While teaching Class 9, I cover all major chapters such as Number Systems, Polynomials, Coordinate Geometry, Linear Equations in Two Variables, Euclid’s Geometry, Lines & Angles, Triangles, Quadrilaterals, Areas of Parallelograms and Triangles, Circles, Surface Area & Volume, Statistics, and Probability. I break down each topic into simple explanations, use diagrams and real-life examples, and gradually increase question difficulty so that students learn step-by-step without feeling overwhelmed. My classroom routine includes concept lectures, guided practice, worksheet solving, and doubt-clearing sessions. I also conduct regular class tests, revision exercises, and previous-year pattern questions to prepare students for school exams and to build confidence for Class 10 board readiness. Students receive formula notes, practice sets, and writing tips that help them attempt questions accurately and manage time effectively in exams. Along with school teaching, my experience with reputed coaching platforms like Byju’s and Allen has strengthened my ability to explain concepts in different ways to match different learning styles—whether a student needs support with basics or is aiming for advanced-level problem solving. Overall, my goal while teaching Class 9 Mathematics is to strengthen conceptual understanding, improve problem-solving skills, and develop a positive attitude towards Mathematics, so students are fully prepared for Class 10 and future academic challenges.

Shaurya Pratap Singh

"I highly recommend Leave to Learn Education Point, especially for students looking for a mentor like Shivam Sir. His teaching methodology is unique and highly effective; he doesn't just focus on rote learning but ensures that every student understands the 'why' behind the concepts. He is incredibly patient, approachable, and always willing to go the extra mile to clear doubts. Since joining his sessions, my confidence and grades have improved significantly. Truly one of the best educators in the area!"

Skills: English , Mathematics and more
Also teaches: Class 10 Tuition, Class 7 Tuition and more

(56)
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locationImg HSR Layout, Bangalore
20 yrs of Exp 16 students
greenClock 1375 hrs of classes completed
rsIcon 500 per hour
Unlocking the Magic of Molecules: Where Chemistry Comes to Life!
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regularClasses Tutor's home

I am doctorate in Chemistry. I have 28 years of teaching experience in the CBSE IGCSE, ICSE and MYP curriculum.

Anum Asif

It was a nice experience, ma'am made subject easy to understand. Thanks, ma'am, for being so helpful.

Skills: Chemistry , Science
Also teaches: Class 11 Tuition, Class 12 Tuition and more

(26)
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locationImg Rohini Sector-24, Delhi
20 yrs of Exp 10 students
greenClock 1476 hrs of classes completed
rsIcon 450 per hour
Experienced Maths teacher with more than 20 years of experience.
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I am a teacher and I have been teaching for the past 20 years. l am presently teaching in a school. l have done MSc in Maths and have taught many students.

Amit Kumar

Thanks Ma'am for supporting Anvi in the subject. She has been getting more comfortable and relaxed with the theory and concepts in mathematics. Her fear is waning away and she shows an increased interest in the subject. I will definitely recommend you to all prospective parents. Thanks again!

Skills: Mathematics , Physics and more
Also teaches: Class 12 Tuition, Class 8 Tuition and more

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Other Subjects in CBSE - Class 9


FAQ

What is the meaning of Free fall, acceleration due to gravity?

It is a fundamental principle in Gravitation that explains the nature and characteristics of Free fall, acceleration due to gravity.

Why is Free fall, acceleration due to gravity important for CBSE - Class 9 exams?

This concept is crucial for the exams as questions related to Gravitation and specifically Free fall, acceleration due to gravity are very common. It helps secure marks in the section effectively.

Is Free fall, acceleration due to gravity part of the latest NCERT syllabus?

Yes, Free fall, acceleration due to gravity is an integral part of the CBSE - Class 9 NCERT Science syllabus. It is a key topic covered in the Gravitation chapter.

What are common mistakes students make with Free fall, acceleration due to gravity?

Students often miss the minute details or fundamental definitions of Free fall, acceleration due to gravity. Regular revision and practice are needed to master the nuances.

How should I approach learning Free fall, acceleration due to gravity?

Read the NCERT text thoroughly to grasp the theory. Create summary notes and flowcharts to retain the key points of Free fall, acceleration due to gravity.

How can UrbanPro help me understand Free fall, acceleration due to gravity better?

UrbanPro connects you with experienced Science tutors who can explain Free fall, acceleration due to gravity with simple examples. You also get access to doubt-clearing sessions and mock tests for better preparation.

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