Important Formulas for Physics
Physics is the branch of science which deals with the study of the world around us and its properties like energy in matter.
Physics of 11th standard contains top-level concepts with questions and numerical problems which requires deep understanding in order to score good marks. These important formulas of physics class 11 will not only help the students in their academic exams but also help in the preparation for various competitive exams like engineering and medical entrances.
The Physics class 11 formula sheet pdf can be considered as the best tool for the preparation of physics examination for Class 11th, and also for various competitive examinations like IIT, NEET, JEE, and so forth.
List of Physics Formulas Class 11 IIT
The list of physics formulas for class 11 IIT studies is given here below:
1. Work, Energy, and Power
Work, energy, and power are the three most used terms in Physics. They are probably the first thing that a student learns in Physics. Work and energy are considered as the two sides of the same coin.
a. Work
Definition: In physics, work is said to be done whenever a force applied to an object, makes the object move.
Formula: Work is calculated by the product of applied force and the displacement of the object.
W = F × d
Unit: The SI unit of work the joule (J), also 1J = 1 Nm (newton-meter)
b. Energy
Definition: Energy is defined as the capacity of a body to do work.
Formula: The formula potential energy is given by:
P.E. = mgh
The formula for kinetic energy is given by:
K.E. = ½(mv²)
Unit: The SI unit of energy is the same as that of work, and it is the joule (J), this unit is named in honor of an English physicist Sir James Prescott Joule.
c. Power
Definition: Power can be defined as the rate at which work is done i.e. energy converted.
Formula: The formula for power is
P = W/t
Unit: The unit of power is Watt (W).
2. Surface Tension Formula
Surface tension is the natural tendency of a liquid surface to resist any force applied on it. Due to surface tension, liquids tend to shrink into the minimum surface area possible. The surface of a liquid behaves like an elastic sheet.
Mathematically, surface tension is expressed as:
T=F/L
Where,
F = force per unit length
L = length in which the applied force acts
T = surface tension of the liquid
3. Simple Harmonic Motion Formula
The simple harmonic motion is a periodic motion in which the restoring force on the object is directly proportional to the displacement of the object from the mean position. The restoring force of the simple harmonic motion is always directed towards the mean position.
The acceleration of a particle under simple harmonic motion (SHM) is given by,
a(t) = -ω2 x(t).
Where,
a = acceleration of the particle
ω = angular velocity of the particle.
4. Projectile Motion Formula
The projectile motion is a motion in which a body is projected in the air, following a curved path under the influence of gravity. When a body is projected in the horizontal direction with a constant velocity, it undergoes free-fall motion.
The formula for projectile motion is given by:
Horizontal distance: x = Vx t
Horizontal velocity: Vx = Vxo
Vertical distance: y = Vyot - ½(gt²)
Vertical velocity: Vy = Vyo - gt
Where,
Vx = the velocity (along the x-axis)
Vy = the velocity (along the y-axis)
Vxo = Initial velocity (along the x-axis)
Vyo = Initial velocity (along the y-axis)
g = acceleration due to gravity
t = the time taken
The equations of the projectile motion are:
Time of flight: t =
The maximum height reached: H =
Horizontal length: R =
Where,
Vo = Initial velocity of the particle
sin θ = Component of velocity along the y-axis
cos θ = component of velocity along the x-axis
5. Gravitational Force Formula
Every object in the universe attracts every other object with a force that is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between them.
Mathematically, the gravitational force formula is given by:
F = Gm1m2/r2
Where,
G = universal gravitational constant
m1 = mass of the first object
m2 = mass of the second object
r = distance between the two objects
6. Waves Motion Formulas
General equation of wave: d2y/dx2 = 1/v2 . d2y/dt2
Notation: Amplitude A, Frequency v, Wavelength λ, Period T, Angular Frequency ω, Wave Number k,
T = 1/v = 2/ ω,
U = v λ
K= 2/ λ
Progressive wave traveling with speed u:
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y = f(t – x/v), => +x,
y = f(t + x/v), => -x
Progressive sine wave:
y = Asin(kx – ωt),
= Asin(2(x/ λ – t/T))
7. Sound Wave Formula
Displacement wave: s = s0sinω(t – x/u)
Pressure wave: p = p0cosω(t – x/u)
P0 = (Bω/u) s0
Speed of sound waves:
uliquid =
usolid =
ugas =
Intensity: I = 22B/u . s02v2 = p02v/2B = p02/2pv
How to Read NCERT Books More Effectively?
In order to learn the formulas of Physics and understand them better, it is necessary to go through the Physics NCERT book weel.
To have a comprehensive knowledge of each topic, read it completely.
When you find any topic complex or difficult to understand, ask your teacher and clear your doubts.
Make a list of the key points to review before the exam.
Solve all the exercise questions asked at the end of all chapters. These questions enable the students to comprehend complex concepts in an easy way.
FAQs on Physics Formulas for Class 11
1. Johnson is Standing on the Top of the Building, and John is Standing Down. If Johnson Tosses a Ball with Velocity 30 m/s and at the Angle of 700 then at the Time 3s What Height will the Ball Reach?
Given:
Vyo = 30 m/s
Δ t = 3s
The Vertical velocity in y-direction is expressed as
Vy = Vyo sin 70o
Vy = 30 sin 70
Vy = 23.22 m/s
2. Gravitational Force Problems
i) Evaluate the Gravitational Force if the Mass of the Sun is 1.99 × 1030 kg & Earth is 5.97 × 1024 kg. They are Separated by the Distance of 1.5 × 1011 m? Here, Gravitational Constant G = 6.673 × 10-11 Nm2/Kg2.
The gravitational force is given by:
F = Gm1m2/r2
= 6.673 * 10-11Nm/Kg2 * 1.99 * 1030kg * 5.97 * 1024lkg
F= (7.93×1044)/(2.25 × 1022)
F= 3.5 * 1022N
3. What will be the Force of Gravity in Between Two Balls of Mass 2kg and 3kg Separated by 2m Distance?
The gravitational force is given by:
F = Gm1m2/r2
= 6.673 * 10-11Nm/Kg2 * 2kg * 3kg)/2m2)
F = 1 * 10-10 N
Physics is a subject which is filled with high level concepts and complex formulas. Students should thoroughly understand the concept behind the formulas to get command over the subject. All formulas of physics class 11 as mentioned above are in a proper manner to help the students develop the concept step by step.
4. How to download the Physics Formulas for Class 11 from the Vedantu Website in PDF Format?
The Physics Formulas for CBSE Class 11 can be found on the Vedantu website and can be accessed for free in PDF Format. Alternatively, the Physics Formulas can also be accessed by clicking on the PDF given above. The Physics formulas are written by a panel of experts and experienced teachers in Physics at Vedantu in conjunction with the relevant instruction by the CBSE board and NCERT. The Physics Formulas for Class 11 are written in a simplified manner so students can easily comprehend and grasp them. Students are required to make use of the formulas provided by Vedantu and use it as a mandatory part of the preparatory stage.
5. What are the advantages of using Class 11 Physics Formulas provided by the Vedantu Website?
There are various advantages to using Vedantu's Class 11 Physics Formulas. The following are some of the significant advantages of using the Physics formulas formulated by the Vedantu team:
A group of experienced instructors and specialists in Physics put together the formulas.
The formulas are based on CBSE guidelines that are current and relevant and in line with the formulas mentioned in the NCERT books and Standard books.
The formulas are explained in a simplified manner, which enables students to grasp complicated formulas easily.
Following Vedantu’s formulas are sufficient for scoring good marks in the examination.
6. What are the CBSE Chapters in the Class 11 Physics Textbook?
Following are the chapters that form part of the Class 11 NCERT Physics Textbook
Chapter 1 Physical World
Chapter 2 Units and Measurements
Chapter 3 Motion in a Straight Line
Chapter 4 Motion in a plane
Chapter 5 Laws of motion
Chapter 6 Work Energy and power
Chapter 7 System of particles and the Rotational Motion in action
Chapter 8 Gravitation
Chapter 9 Mechanical Properties Of Solids
Chapter 10 Mechanical Properties Of Fluids
Chapter 11 Thermal Properties of matter
Chapter 12 Thermodynamics
Chapter 13 Kinetic Theory
Chapter 14 Oscillations
Chapter 15 Waves
For anyone interested in becoming an engineer or going into the mechanical or technical field, physics is one of the most important subjects to study in school. Before pursuing engineering, it is critical to establish your fundamentals and provide a solid foundation. Thus, students are required to practice Physics diligently and regularly to get the required practice before the examination.
7. Is learning the NCERT Physics book for Class 11 considered enough for securing good marks in the CBSE board examination?
As the CBSE board rarely repeats questions and is considered to be quite unpredictable in its question paper pattern, students are required to solve multiple questions of varying levels of difficulty to have enough practice to secure good marks. The NCERT book consists of a vast number of questions which is generally considered adequate for preparing for the CBSE board exam. However, students must solve all questions carefully. In addition, students must also solve multiple sample papers and previous year question papers to have an upper hand in their preparation.
8. Why should students study Physics in class 11?
In most competitive exams for science courses, physics is a required subject. Physics aids in the comprehension of the world around you as well as the satisfaction of your curiosity. Physics improves critical thinking and problem-solving abilities. Physicists are adaptable, which allows them to pursue a variety of prospective occupations. Physics propels technological progress, which has ramifications for society, the environment, and the economy. Studying Physics improves students' quantitative thinking, quantitative thinking, and problem-solving skills, which are useful in fields other than physics. Furthermore, because Physics is a basic topic for competitive examinations, having a thorough understanding of the subject will be extremely advantageous in the future.
