Physics Formulas

Physics Formulas

List of All Physics Formulas

FAQ (Frequently Asked Questions)

1. How can I memorise Physics formulae easily?
A. Learning Physics formulae is very important for every student while preparing for board exams and other competitive exams. But the most asked question raised in every student’s mind is how to learn the formulae easily. There is no shortcut for it. The one and only way is you have to practice as much as possible. This may sound like a very common idea but this is one and only efficient way to memorise the Physics formulae. The more you practice numerical problems of Physics using the required formulae, the more likely you are to memorise all of them.
You can jot down all the important formulae at one place so that you can glance through them whenever you have some free time. This is also another way to revise and memorise all the formulae.
2. Is it possible to get all the important Physics formulae at one place?
A. Yes, it is possible to get all the important Physics formulae at one place if you look into the website of India’s one of the leading ed-tech companies, CoolGyan. We at CoolGyan offer the list of all the important formulae at one page. You can check these formulae on our official website or our mobile app directly. All these study materials are available for free.
3. Tell me the Charge density formula.
A. The charge density is defined as in a measure of how much electric charge is being accumulated in a particular field. It measures the amount of electric charge:
1) Per unit length (linear charge density),
2) Per unit area (surface charge density),
3) Per unit volume (volume charge density)
Charge density depends on the charge distribution and it can be positive or negative. Depending on nature, charge density formula can be given by,
  • Linear Charge Density:

λ = q / l, where q is the charge and l is the length over which it is distributed. The SI unit is (Coulomb) Cm–1.

  • Surface Charge Density:

σ = q / A, where, q is the charge and A is the area of the surface. The SI unit is (Coulomb) Cm–2.

  • Volume Charge Density:

ρ = q / v, where q is the charge and V is the volume of distribution. The SI unit is (Coulomb) Cm–3.

4. What is the formula for gravitational force?
A. Force due to gravity acts in a downward direction. So for a freely falling object work done by force due to gravity is given by – W = mgh.

[Where W = work done, g = acceleration due to gravity, h = height of free fall
If the angle between gravitational force and direction of motion is 𝚹, then work done due to gravity is given by, W = mgh cos 𝚹
So if an object is moving in a horizontal direction on the surface of the earth, then work done by gravity is ‘zero’.