Work, Energy & Power - JEE Physics

What is Work?

Work is done when a force causes displacement. It is calculated as: W = F × d × cosθ

Types of Work

• Positive Work – Force and displacement in same direction
• Negative Work – Force and displacement in opposite direction
• Zero Work – No displacement or force is perpendicular

Energy

It is the capacity to do work. Two main forms: Kinetic Energy (K.E = ½mv²) and Potential Energy (P.E = mgh)

Power

Rate of doing work or energy conversion. Power = Work / Time Unit: Watt (W)

JEE Tip

Focus on conceptual clarity. Try to visualize direction of force & motion. Solve previous year questions (PYQs) after concept is clear.

"Physics tab easy lagta hai jab tum sochne lagte ho – feel karo, ratta mat maaro!"