Physics Formulas

The understanding of concepts in Physics is a basic block without which you are nowhere.

Often when one understands that the theories thoroughly, we see that they can easily discover the relation between the quantities by which they can construct the formulas that generally derive it and learning for them will be simple.

The questions which are in the subject physics are something which challenges your skills and physics knowledge as well. These are grounded on three things:

1. To examine what is provided and what is asked in the numerical.

2. Next is the making use of the correct formula.

3. Filling in the values and computing properly.

To crack all these kinds of challenges which are in the form of questions one needs to have a proper understanding of the subject of Physics formulae as well as its concepts.

Here,  provided all physics formulas in a simple format in our effort to create a repository where a scholar can get hold of any sought after formulas.

Important Physics Formulas

• Planck constant h = 6.63 × 10⁻³⁴ J.s = 4.136 × 10^-15 eV.s

• Gravitation constant G = 6.67×10⁻¹¹ m³ kg⁻¹ s⁻²

• Boltzmann constant k = 1.38 × 10⁻²³ J/K

• Molar gas constant R = 8.314 J/(mol K)

• Avogadro’s number NA = 6.023 × 10²³ mol⁻¹

• Charge of electron e = 1.602 × 10⁻¹⁹ C

• Permittivity of vacuum 0 = 8.85 × 10⁻¹² F/m

• Coulomb constant 1/4πε₀ = 8.9875517923(14) × 10⁹ N m²/C²

• Faraday constant F = 96485 C/mol

• Mass of electron m_e = 9.1 × 10⁻³¹ kg

• Mass of proton m_p = 1.6726 × 10⁻²⁷ kg

• Mass of neutron m_n = 1.6749 × 10⁻²⁷ kg

• Stefan-Boltzmann constant σ = 5.67 × 10⁻⁸ W/(m² K⁴)

• Rydberg constant R_∞ = 1.097 × 10⁷ m⁻¹

• Bohr magneton µ_B = 9.27 × 10⁻²⁴ J/T 

• Bohr radius a₀ = 0.529 × 10⁻¹⁰ m 

• Standard atmosphere atm = 1.01325 × 10⁵ Pa 

• Wien displacement constant b = 2.9 × 10⁻³ m K .

• Wave = ∆x ∆t wave = average velocity ∆x = displacement ∆t = elapsed time.

• V_avg = (vi + vf*)²

V_avg = The average velocity 

vi = initial velocity 

vf = final velocity that is another definition of the average velocity which works where letter a is constant.

• a = ∆v ∆t,

A = acceleration 

∆v = change in velocity 

∆t = elapsed time.

• ∆x = vi∆t + 1/2 a(∆t)²

∆x = the displacement 

vi = the initial velocity 

∆t = the elapsed time 

a = the acceleration 

Use this formula when you don’t have vf. 

• ∆x = vf∆t − 1/2 a(∆t)²

∆x = displacement 

vf = is the final velocity 

∆t = elapsed time 

a = acceleration 

Use this formula when you don’t have vi.

• F = ma 

F = force 

m = mass 

Then a = acceleration Newton’s Second Law. 

F is the net force on the mass m. 

• W = mg 

W = weight 

m = mass 

g = acceleration which is due to gravity.

Then we see that the weight of an object with mass m. This is said to be really just Newton’s Second Law. 

• f = µN f = friction force 

µ = coefficient of friction 

N = normal force 

Here µ can be either the kinetic coefficient of friction µk or the static coefficient of friction. 

• p = mv

• W = F d cos θ or W = F!d 

W = work t

F = force 

d = distance 

θ = angle between F and the direction of motion 

• KE  = 1/2 mv² K

KE = kinetic energy

m = mass

v = velocity

• PE = mgh 

PE = potential energy 

m = mass 

g = acceleration due to gravity 

h = height

• W = ∆(KE) 

W = work done 

KE = kinetic energy. 

The “work-energy” which we have learnt is the theorem that is the work done by the net force on an object equals the change in kinetic energy of the object. 

We can write it as E = KE + PE 

E = total energy

KE = kinetic energy

PE = potential energy

• P = W ∆t P = power

W = work

∆t = elapsed time

Power is the amount of work which is done per unit time that is power is the rate at which work is done.