Today's Daily Quiz is Live — Test your knowledge & improve your rank
|

Top Physics Formulas

Essential physics formulas with solved examples.

1
Newton Second Law of Motion
F = m × a

Calculate force from mass and acceleration.

View Explanation
2
Work Done
W = F × s × cos(θ)

Calculate work done by a constant force.

View Explanation
3
Kinetic Energy
KE = ½ × m × v²

Calculate energy due to motion.

View Explanation
4
Ohm Law
V = I × R

Relate voltage, current and resistance.

View Explanation
5
Power
Power = Work / Time

Calculate the rate at which work is done.

View Explanation
6
Wave Speed
v = fλ

Calculate wave speed from frequency and wavelength.

View Explanation
7
Electrical Power
P = VI = I²R = V²/R

Calculate electrical power in a resistive circuit.

View Explanation
8
Acceleration
a = (v - u) / t

Calculate average acceleration for constant acceleration.

View Explanation
9
Third Equation of Motion
v² = u² + 2as

Relate velocity, acceleration and displacement without time.

View Explanation
10
Heat Energy
Q = mcΔT

Calculate heat transferred for a temperature change.

View Explanation
11
Velocity
v = s / t

Calculate average velocity.

View Explanation
12
Force and Momentum
F = dp / dt

Relate force to rate of change of momentum.

View Explanation
13
Centripetal Force
F = mv² / r

Calculate the force required for circular motion.

View Explanation
14
Frequency and Time Period
f = 1 / T

Relate frequency and time period.

View Explanation
15
Snell Law
n₁ sin i = n₂ sin r

Relate angles of incidence and refraction.

View Explanation
16
Mirror Formula
1/f = 1/v + 1/u

Relate focal length, object distance and image distance for spherical mirrors.

View Explanation
17
Specific Heat Capacity
c = Q / (m ΔT)

Define specific heat capacity.

View Explanation
18
Latent Heat
Q = mL

Calculate heat required for phase change.

View Explanation
19
Resistance in Series
Rₛ = R₁ + R₂ + R₃ + …

Find equivalent resistance when resistors are connected in series.

View Explanation
20
Resistance in Parallel
1/Rₚ = 1/R₁ + 1/R₂ + 1/R₃ + …

Find equivalent resistance when resistors are connected in parallel.

View Explanation
21
Momentum
p = m × v

Calculate linear momentum.

View Explanation
22
Pressure
P = F / A

Calculate pressure exerted on a surface.

View Explanation
23
Potential Energy
PE = mgh

Calculate gravitational potential energy near Earth.

View Explanation
24
Density
ρ = m / V

Calculate mass per unit volume.

View Explanation
25
First Equation of Motion
v = u + at

Calculate final velocity under constant acceleration.

View Explanation
26
Second Equation of Motion
s = ut + ½at²

Calculate displacement under constant acceleration.

View Explanation
27
Lens Formula
1/f = 1/v - 1/u

Relate focal length, image distance and object distance for a thin lens.

View Explanation
28
Impulse
Impulse = F × Δt = Δp

Calculate impulse delivered by a force.

View Explanation
29
Angular Velocity
ω = θ / t = 2π / T

Calculate angular velocity.

View Explanation
30
Magnification of Mirror
m = -v / u = h′ / h

Calculate magnification produced by a mirror.

View Explanation
31
Ohm Law Power
P = I²R = V²/R

Calculate power using current or voltage and resistance.

View Explanation
32
Electric Current
I = Q / t

Define electric current.

View Explanation