Topic Details (Notes format)

Work, Energy, and Power

Subject: General Science

Book: NCERT Science Class 11

Work, energy, and power define how forces interact with motion.
- **Work Done**:
- W = F × d × cosθ (Force × displacement × angle).
- **Types of Energy**:
- Kinetic Energy (KE = ½mv²).
- Potential Energy (PE = mgh).
- **Law of Conservation of Energy**:
- Energy cannot be created or destroyed.
- **Power**:
- P = Work/Time (Rate of doing work).

**Possible Exam Questions:**
1. Define work and derive its formula.
2. What is kinetic energy? Derive its equation.
3. How does the law of conservation of energy apply in nature?
4. What is the SI unit of power? Give examples.
5. Explain why power is a scalar quantity.

Practice Questions

What is the SI unit of power?

View Question

What type of electromagnetic radiation has the longest wavelength?

View Question

What is the chemical name of table salt?

View Question

Which gas is commonly used in balloons to make them float?

View Question

Which gas is used in fire extinguishers?

View Question

What is the unit of electric current?

View Question

What is the term for an organism that can make its own food?

View Question

What is the largest organ in the human body?

View Question

Which part of the brain is responsible for balance and coordination?

View Question

Which metal is liquid at room temperature?

View Question