Work, Energy and Power
Work, Energy and Power is one of the most important mechanics chapters in JEE Main Physics.
It explains work done by forces, kinetic energy, potential energy, conservation of energy,
power, and collisions. This chapter is highly scoring and forms the base for many advanced mechanics topics.
Topics Covered
- Work Done by Constant and Variable Forces
- Kinetic Energy
- Potential Energy
- Work-Energy Theorem
- Conservation of Mechanical Energy
- Spring Potential Energy
- Power
- Elastic and Inelastic Collisions
- Center of Mass Energy Concepts
Important Formulas
Work Done:
W = F s cosθ
Kinetic Energy:
K = ½mv²
Potential Energy:
U = mgh
Spring Potential Energy:
U = ½kx²
Power:
P = W/t = Fv
Work-Energy Theorem:
W = ΔK
JEE Main Preparation Tips
- Master work-energy theorem applications.
- Practice collision-based numerical problems.
- Understand conservative and non-conservative forces.
- Focus on spring and gravitational energy questions.
- Solve previous year JEE Main questions for speed and confidence.
