Class 9 physics ke sabhi important formulas ka yaha ek summary hai jo aapke exams ke liye helpful ho sakta hai:
Motion
1. Speed = Distance / Time
v = \frac{s}{t}
2. Velocity = Displacement / Time
v = \frac{d}{t}
3. Acceleration
a = \frac{v_f - v_i}{t}
4. Equations of Motion
(Here, = Initial velocity, = Final velocity, = Acceleration, = Displacement, = Time
5. Uniform Circular Motion
v = \frac{2\pi r}{T}
Force and Laws of Motion
1. Newton's Second Law
F = ma
2. Momentum
p = mvl
3. Impulse
Impulse = F \cdot t = \Delta p
Gravitation
1. Force of Gravitation
F = G\frac{m_1m_2}{r^2}
2. Acceleration due to Gravity
g = \frac{GM}{R^2}
3. Weight
W = mg
4. Gravitational Potential Energy
U = mgh
5. Kepler's Formula (Universal Law of Gravitation for Orbit)
T^2 \propto r^3
Work, Energy, and Power
1. Work Done
W = F \cdot d \cdot \cos\theta
2. Kinetic Energy
KE = \frac{1}{2}mv^2
3. Potential Energy
PE = mgh
4. Power
P = \frac{W}{t}
5. Relation between Kinetic and Potential Energy
Total\:Energy = KE + PE
Sound
1. Speed of Sound
v = \lambda f
2. Echo
t = \frac{2d}{v}
3. Intensity
I = \frac{P}{A}
Agar aapko inme se kisi topic par detail mein samajhna ho to mujhe batayein!
