Home
Learn
Plan & Focus
Community
Pricing
Play & Compete
Free Resources

Log in Join Free

by JEE Master

Ask. Share. Learn. Grow Together. India's all-in-one community for JEE Main & JEE Advanced aspirants.

Explore

Learn
Plan & Focus
Community
Play & Compete
Free Resources

Resources

JEE Main PYQs
JEE Advanced PYQs
Formula Sheets
NCERT Mapping
Mock Analysis

Support

Help Center
Privacy Policy
Terms of Use
Contact Us

© 2026 PadhoNa. All rights reserved.

Formula Sheets / Physics

Chapter 7

Work Power Energy

Revise with flashcards Download this chapter (PDF) All Physics formulas (PDF)

Work and energy Power Vertical circular motion

Work and energy

Work
$W = F \cdot s = F s cos θ,$ $W = \int F \cdot d r$
Work–energy theorem
$W_{net} = Δ K = \frac{1}{2} m v^{2} - \frac{1}{2} m u^{2}$
Potential energy
$F = - \frac{d U}{d x};$ $U = m g h;$ $U_{spring} = \frac{1}{2} k x^{2}$
Kinetic energy and momentum
$K = \frac{p ^{2}}{2 m}$
Equilibrium
$\frac{d U}{d x} = 0;$ $P = \frac{d W}{d t} = F \cdot v,$ stable $, < 0$ unstable

Power

$P = \frac{d W}{d t} = F \cdot v,$ $η = \frac{output}{input}$

Vertical circular motion

String
$v_{bottom} \geq 5 g l,$ $v_{top} \geq g l,$ $T_{bottom} - T_{top} = 6 m g$
Rod (rigid)
$v_{bottom} \geq 4 g l$

Circular Motion Center of Mass Momentum and Collision