On this page, students will find a compilation of all the formulas related to the topic of work, energy and power. The list of formulas will help students to revise all the important notes quickly before the entrance exams.

Work, Power and Energy Formulas

1. Work Done by Constant Force

W = FS cos Ө

It is a scalar quantity

2. Work done by Multiple Forces

W = W1 +W2+W3+….

Work done on the particle is the sum of the individual work done by all the forces acting on the particles.

3. Dimensions of work

Work = [ML²T^-2]

4. Kinetic Energy

As mass is a positive quantity kinetic energy is a positive quantity.

K = ½ mv²= p²/2m

p is the linear momentum

5. Potential Energy

F = -dU/dx for conservative forces

U_{Gravitational} = mgh

U_spring =(1/2) kx²

6. Work energy theorem

According to the theorem, the change in kinetic energy of a body is the net work done by the net force on the body

W= ∆K

7. Mechanical energy

Mechanical energy E of an object or a system is the sum of kinetic energy K and potential energy U.

E= U+K. Conserved if forces are conservative in nature

8. Power

P_av = W/t ,

Here W is the work done and t is the time taken

Video Lessons

Work, Power and Energy Video Lesson

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Work, Energy and Power MCQs

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Work, Power and Energy Problems and Solutions

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Work, Power and Energy Video Lesson

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