JEE Main Physics Formulas 2026 - JEE Main exam is one of the top exams for engineering in India. Having a consolidated formula sheet makes your preparation for the JEE Main exam more manageable and efficient. Candidates should manage all three subjects properly, when candidates have a compiled list of important physics formulas candidates can revise the concepts faster and solve numerous problems easily. Knowing when and which formula to apply is crucial for aspirants. Here are some important JEE Main 2026 Physics formulas based on the JEE main 2026 syllabus. Candidates can follow the Physics formulas to prepare for the IIT JEE exam.

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Few Important JEE Main Physics Formulas 2026

Chapter - Kinematics

Speed and Velocity

I. Speed Formula-

Speed $= \frac{Change in distance}{change in time}$
$v = \frac{distance}{time}$
- Tips of Speed-
1. S.I. unit $⟶ {ms}^{- 1}$ or meters per second.
2. Dimensions $= L T^{- 1}$
3. Speed is a scalar quantity.
- E.g: A body covers a distance of 18 m in 1 sec

Using the formula of speed. $v = \frac{distance}{time} = \frac{18 m}{1 s} \Rightarrow 18 m / s$

II. Average Speed and Instantaneous Speed

Average Speed Formula-

Average speed $= \frac{total distance covered}{total time taken} v_{a v} = \frac{s}{t}$

E.g. A body covers a total distance of 50 m with variable speed in 5 sec.

$\begin{aligned} v_{a v} = \frac{s}{t} \\ \Rightarrow \frac{50 m}{5 s} = 10 m / s \end{aligned}$

Average Speed $= 10 m / s$
- Tips for average speed-

If an object or body covers s1 distance in $t 1$ time and s2 distance in 12 time then average speed is calculated by the Formula- $V_{α v} = \frac{s_{1} + s_{2}}{t_{1} + t_{2}}$
2. Instantaneous Speed-
- It is the speed at that particular instant or small interval of time.
- Formula-

$v_{inst} = lim_{Δ t \to 0} \frac{Δ x}{Δ t}$

III. Velocity

Rate of change of displacement with time.
Formula-

$V = \frac{displacement}{time}$

- Tips For Velocity-
1. S.I. unit $\to m / s$
2. Dimensions- $L T^{- 1}$
3. Velocity is a vector quantity.
4. Velocity is also called speed in a definite (particular) direction.
IV. Average Velocity and Instantaneous Velocity
1. Average Velocity-Formula-

Average Velocity $= \frac{Total Displacement}{Total time taken} {\vec{V}}_{avg} = \frac{{\vec{S}}_{net}}{t}$
2. Instantaneous Velocity Formula-

${\vec{V}}_{inst} = lim_{Δ t \to 0} \frac{\vec{Δ x}}{Δ t}$

Chapter - Work Energy and Power
- Work done by a constant force-
1. The scalar product of the force vector $(\vec{F})$ and the displacement vector $(\vec{S})$

$W = \vec{F} \cdot \vec{S}$

2. The product of the magnitude of force $(F)$ magnitude of displacement $(S)$ and cosine of the angle between them $(Θ)$

$W = F S \cos θ$

3. If the number of forces ${\vec{F}}_{1}, {\vec{F}}_{2}, {\vec{F}}_{3} \dots \dots, {\vec{F}}_{n, are acting on a body and it shifts from position vector} {\vec{r}}_{1}$ to position vector ${\vec{r}}_{2}$
Then
$W = ({\vec{F}}_{1} + {\vec{F}}_{2} + {\vec{F}}_{3} \dots \dots \dots + {\vec{F}}_{n}) \cdot ({\vec{r}}_{2} - {\vec{r}}_{1}) = {\vec{F}}_{n e t} \cdot {\vec{r}}_{n e t}$
- Work done by a variable force
Force is a vector quantity. So it has a magnitude as well as direction. A variable force means when its magnitude its direction or both varies with position.
And work done by the variable force is given by -
$W = \int \vec{F} \cdot \vec{d s}$

Where $\vec{F}$ is a variable force and $\vec{d}$ is a small displacement
- Kinetic energy
$K . E . = \frac{1}{2} m v^{2}$

Where $m \to$ mass
$v \to velocity$
- Work-energy theorem-
Net work done by all the forces acting on a particle is equal to the change in its kinetic energy.
$\begin{aligned} W & = \frac{1}{2} m v^{2} - \frac{1}{2} m v_{0}^{2} \\ W & = k_{f} - k_{i} \end{aligned}$

Where $m =$ mass of the body

$v_{0} =$ initial velocity
$v =$ final velocity
- Relation of kinetic energy with linear momentum

$k = \frac{p^{2}}{2 m}$

Where $p \to$ momentum

$m \to mass$

- Change in potential energy -

The change in potential energy between any two points is defined as the work done by the associated conservative force in displacing the particle between these two points without any change in kinetic energy.

$U_{i} - U_{f} = \int_{r_{i}}^{r_{f}} \vec{f} \cdot \vec{d s}$

Where, $U_{f}$ - final potential energy
$U_{i}$ - initial potential energy
$f$ -force
ds - small displacement
$r_{i}$ - initial position
$r_{f} - f i n a l$ position
We can define a unique value of potential energy only by assigning some arbitrary value to a fixed point called the reference point.
- Power

Average power-

$P_{a v} = \frac{Δ w}{Δ t} = \frac{\int_{0}^{t} p \cdot d t}{\int_{0}^{t} d t}$

Instantaneous power-

$P = \frac{d w}{d t} = P = \vec{F} \cdot \vec{v}$

Where, $\vec{F} \to$ force

$\vec{v} \to velocity$

i.e. power is equal to the scalar product of force with velocity

Experts have compiled a list of important formulas for JEE Mains Physics to make the preparation easy for aspirants. Candidates preparing for the JEE Main exam should remember all the major formulas.

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