Important Formulas for Class 8 Science and Maths
In Class 8, students encounter various important concepts in both Science and Maths. Below are the essential formulas and concepts divided by subject, along with some numerical examples for Physics.

Mathematics Formulas
- **Algebra:**
- **Polynomials:** a² + b² = (a + b)² - 2ab
- **Linear Equations:** ax + b = 0, where a ≠ 0.
- **Geometry:**
- **Area of Rectangle:** A = length × width
- **Area of Triangle:** A = ½ × base × height
- **Circumference of Circle:** C = 2πr
- **Statistics:**
- **Mean:** Mean = (Sum of all observations) / (Number of observations)

Science Concepts and Formulas
- **Physics:**
- **Force:** F = m × a (where F is force, m is mass, and a is acceleration)
- **Example:** If a mass of 5 kg accelerates at 2 m/s², then F = 5 × 2 = 10 N.
- **Chemistry:**
- **Chemical Reactions:** Reactants → Products
- **Law of Conservation of Mass:** Mass of reactants = Mass of products
- **Biology:**
- **Photosynthesis Formula:** 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Numericals in Physics
- **Numerical Example:**
- Calculate the force applied to a mass of 10 kg that accelerates at 3 m/s².
- **Solution:** F = m × a = 10 kg × 3 m/s² = 30 N.
Understanding these key formulas and concepts will greatly aid in mastering Class 8 Science and Maths. Always practice with different numerical problems to strengthen your understanding!