Class 9th Physics Formula Sheet PDF

# Class 9th Physics Formula Sheet ## Made by: Ajay Poonia - This formula sheet is for class 9th Science. - DO NOT TRY TO SELL THESE NOTES. - You can check the Youtube channel of the author. ## Important Suchna Hi everyone, my aim is to provide free and quality education across all over India....

# Class 9th Physics Formula Sheet ## Made by: Ajay Poonia - This formula sheet is for class 9th Science. - DO NOT TRY TO SELL THESE NOTES. - You can check the Youtube channel of the author. ## Important Suchna Hi everyone, my aim is to provide free and quality education across all over India. ## Motion - Speed: Distance/Time - Velocity: Displacement/Time - Average Speed: Total distance/Total time - Average velocity: Total displacement/Total time - u = initial velocity - v = final velocity - **Equation of motion:** - V = u + at - S = ut + 1/2at² - v² - u² = 2as - v = final velocity - u = initial velocity - a = acceleration - t = time - S = displacement - u + v / 2 ## Force & Law's of Motion - **Force:** Force = mxa = m (v-u/t) = { v-u/t} - F = force, m = mass, a = acceleration, v & u = velocities - **Momentum:** P = mv - m = mass - v = velocity - **Conservation of Momentum:** - **Before Collision:** maua + mbub - **After Collision:** mava + mbvb ## Momentum is conserved Total momentum before collision = Total momentum after collision maua + mbub = mava + mbvb ## Sound - **Velocity of wave:** V = fλ - f = frequency - λ = wavelength - **Frequency:** f = 1/t - t = time period ## Work & Energy - **Work:** W = F × S - [Work done = Force × displacement] - **Potential Energy:** PE = mgh - m = mass - g = acceleration due to gravity - h = height of the object - **Kinetic Energy:** KE =1/2mv² - m = mass of object - v = velocity of object ## Work Energy Theorem: - Change in KE = Work done = 1/2 m (v² - u²) - KE = W = 1/2 m (v² - u²) - m = mass - u = initial velocity - v = final velocity ## Gravitation - **Universal law of gravitation:** - F = Gm1m2/R² - F = gravitational force between two objects - G = universal gravitational constant - m1 = mass of object 1 - m2 = mass of object 2 - R = centre to centre distance between 2 objects - G = 6.67 × 10⁻¹¹ Nm²Kg⁻² - **Acceleration due to gravity (g):** - g = GM/R² - g = acceleration due to gravity - M = mass of Earth - R = radius of Earth ## Equation of Motion for a Body Moving Under Gravity - **Equation of motion for free falling body:** - v = u + gt - H = ut +1/2 gt² - v² = u² + 2gh - **Equation of motion for bodies thrown vertically upward:** - v = u - gt - H = ut - 1/2 gt² - v² = u² - 2gh ## Thank you - like, SHARE - SUBSCRIBE - TUITION TOWN - AJAY POONIA