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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.
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
Super Tutor 
Lalpur, Ranchi 
15 students 
2251 hrs of classes completed 
500 per hour 
Online Classes I am a qualified and dedicated teacher, having 10 years of teaching and research experience across different boards including CBSE, ICSE, IGCSE, IB, GCSE, and Australian Board. I specialize in guiding students from Class 8 to Post Graduation, helping them achieve academic excellence with a tailored and engaging teaching approach. I bring in-depth knowledge and expertise to my sessions. Qualifications: • Ph. D (Science) – BIT Mesra, Ranchi • CSIR UGC NET (2011) AIR-14 • ICAR NET (2010) • ICAR NET (2018) • GATE (2009) My student-centered approach focuses on assessing individual learning needs, bridging knowledge gaps, and fostering critical thinking through interactive methods like discussions, visual aids, and hands-on activities. Regular feedback and personalized guidance empower students to excel and develop a lifelong love for learning.
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Super Tutor Sector 92, Gurgaon 20 students 1289 hrs of classes completed 800 per hour Online Classes 
Student's Home 
Tutor's home Teaching since last 20 years
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Super Tutor Itagalpura Main Rd, Madappanahalli 43 students 3527 hrs of classes completed 400 per hour Online Classes I gained extensive experience in delivering high-quality education following the CBSE/ICSE curriculum. My key responsibilities included: Classroom Teaching: Effectively taught Mathematics, Physics and Chemistry to students of classes IX, ensuring alignment with the CBSE/ ICSE syllabus and fostering a deep understanding of key concepts. Curriculum Planning: Designed and implemented lesson plans that adhered to the CBSE guidelines, ensuring comprehensive coverage of topics while keeping in mind the varying learning needs of students. Student Assessment: Created and administered tests, quizzes, and assignments in accordance with the CBSE exam pattern. Monitored student performance and provided constructive feedback to facilitate continuous improvement. Interactive Learning: Encouraged an interactive classroom environment, integrating various teaching aids such as multimedia presentations, hands-on activities, and group discussions to enhance student engagement and understanding. Preparation for Board Exams: Provided focused support for students appearing for their CBSE/ICSE board exams by conducting regular revision sessions, mock tests, and personalized guidance to help them excel. Parental Communication: Maintained regular communication with parents regarding student progress, attendance, and overall development. Organized parent-teacher meetings to ensure a collaborative approach to student growth. Co-curricular Involvement: Actively participated in school events, projects, and extracurricular activities, fostering holistic development among students. Professional Development: Engaged in continuous professional development through workshops and CBSE training programs to stay updated with the latest educational practices and policies.
Super Tutor Sector 5, Dwarka, Delhi 33 students 1170 hrs of classes completed 500 per hour Online Classes I teach Math and Science to 8th-12th standard students and have been teaching for more than 10 years. Batch of 2 Students: I conduct these small batches with a pair of students of the same class and the education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). Works for those students/parents who are looking for individual attention for their kids but still want it to be a little affordable. *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 4500/- per month/12 classes. Batch of 6 Students: I conduct these small batches with 5-6 students of the same class and the education board (I cover all popular boards CBSE, ICSE, IGCSE etc.). *4 classes per week (So 16 a month) *Maths and Science *Fee Rs. 4000/- per month/16 classes. I will start the classes immediately once the first kid enrolls. ------------------------------------------------------------------------------- Individual/Private/One-to-One classes: I conduct these one to one classes for those students willing to have one to one setup (I cover all popular boards CBSE, ICSE, IGCSE etc.). *3 classes per week (So 12 a month) *Maths and Science (Also English Grammar and Literature) *Fee Rs. 7000/- per month/12 classes. ------------------------------------------------------------------------------- I took classes and batches in different institutions.
The teacher is very good. He understands the students strength and weakness and decides the pace of learning. He also tries to make the student comfortable and at ease with his/her capacity and then works on the child. It is not just Math he works on but the child's confidence and comfort with the subject. Highly recommended.
Super Tutor Rohini Sector-24, Delhi 10 students 1413 hrs of classes completed 450 per hour Online Classes 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.
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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.
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