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Physics Formulas
Kinematics, Force, Motion, Work, Energy, Power, Momentum, Thermal Physics, Etc.
| Question | Answer |
|---|---|
| Newton’s Second Law of Motion | F = m × a |
| Work-Energy Theorem | W = ΔKE (Work = The change in Kinetic Energy) |
| Kinetic Energy | KE = 1/2mv^2 |
| Potential Energy (Gravitational) | PE = mgh |
| Hooke’s Law (Spring Force) | Fs = −kx: Fs is the spring force, k is the spring constant, x is the displacement from the equilibrium position. |
| Newton’s Law of Universal Gravitation | F = G ⋅ m1 ⋅ m2 / r2 F is the gravitational force between two masses, G is the gravitational constant, m1 and m2 are the masses, r is the distance between the centers of the masses. |
| Displacement (s) | s = Vit + 1/2 at^2 s is the displacement. Vi is the initial velocity a is the acceleration, t is the time. |
| Final Velocity (Vf) | Vf = Vi + at Vf is the final velocity, Vi is the initial velocity, a is the acceleration, t is the time. |
| Kinematic Third Equation of Motion | Vf^2 = Vi^2 + 2as Vf is the final velocity, Vi is the initial velocity, a is the acceleration, s is the displacement. |
| Average Velocity (Vavg) | Vavg = Δx / Δt |
| Acceleration (a) | a = Δv /Δt or F/m(Newton's Second Law) |
| Electric Current (I) | I = Q/t I is the electric current (measured in Amperes, A). Q is the charge that passes through a given point. t is the time taken. |
| Electric Charge (Q) | Q = I × t Q is the electric charge (measured in Coulombs, C). I is the electric current. t is the time taken. |
| Ohm’s Law | V = IR V is the voltage, I is the current, R is the resistance. |
| Power | P = VI P is the power, I is the current, V is the voltage. |
| Resistance | R = ρl / A R is the resistance, ρ is resistivity, l is length, and A is area |
| Watt’s Law | P = I²R or P = V²/R R is the resistance, I is Current, and V is Voltage |
| Electric Energy | P = W x T P is power, W is energy, T is time |
| Voltage | V = E / Q E is energy, Q is charge |
| Electric Field (E) | E = F/q E is the electric field. F is the force experienced by the charge. q is the magnitude of the charge. |
| Faraday’s Law of Electromagnetic Induction | ε = dΦ/dt ε is the induced EMF. Φ is the magnetic flux through the loop. t is time. |
| Magnetic Force on a Moving Charge | F = qvBsinθ F is the magnetic force, q is the charge, v is the velocity, B is the magnetic field strength, θ is the angle between v and B. |
| Gauss’ Law for Electric Field | Φ = q/εo εo is the electric permittivity of free space Φ is the magnetic flux through the loop. q is the net charge enclosed by the surface. |
| Electric Potential (Voltage) | V = W/q V is the electric potential (voltage). W is the electric potential energy. q is the charge. |
| Speed of Sound | v = √(B/p) v is the speed of sound, B is the bulk modulus of the medium, ρ is the density of the medium. |
| Wavelength (λ) | λ = v/f λ is Wavelength v is Speed of sound f is Frequency of the sound wave |
| Frequency (f) | f = v / λ f is Frequency v is Speed of sound λ is Wavelength |
| Acoustic Impedance (Z) | Z = ρ × c Z is Acoustic impedance ρ is Density of the medium c is Speed of sound in the medium |
| Density | ρ = mV ρ is density of fluid m is mass, and v is volume |
| Pressure | P = F/A P is the pressure of the fluid, F is applied Force, A is area |
| Pressure at a Depth h in a Fluid of Constant Density | p = po + ρgh p is pressure at height h po is the pressure at the fluid’s surface, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth to which the object is submerged |
| Viscosity | η = FL/vA η is fluid viscosity F is force L is distance between the plates V is constant velocity A is area of the plate |
| Pascal’s Law | F = PA F is applied Force P is Pressure, and A is area under cross-section. |
| Reynolds Number (Re) | Re = pvL/μ ρ is the density of the fluid. v is the velocity of the fluid. L is a characteristic length (e.g., diameter of the pipe). μ is the dynamic viscosity of the fluid. |
| First Law of Thermodynamics (Energy Conservation) | ΔU = Q − W ΔU is the change in internal energy, Q is the heat added to the system, W is the work done by the system. |
| Work Done in Isothermal Process (Ideal Gas) | W = nRTln(Vf/Vi) W is the work done, n is the number of moles of gas, R is the ideal gas constant, T is the temperature, ln is the natural logarithm Vf is the final volume, Vi is the initial volume. |
| Heat Transfer (Constant Pressure) | Q = nCp ΔT Q is the heat added or removed, n is the number of moles of gas, Cp is the specific heat at constant pressure, ΔT is the change in temperature. |
| Ideal Gas Law | PV = nRT P is the pressure of the gas. V is the volume of the gas. n is the number of moles of gas. R is the gas constant. T is the temperature of the gas. |
| Entropy Change | ΔS = Q/T ΔS is the change in entropy. Q is the heat. T is the temperature. |
| Wave Velocity (v) | v = f × λ v = Wave velocity (in meters per second, m/s) f = Frequency of the wave (in Hertz, Hz) λ = Wavelength of the wave (in meters, m) |
| Frequency (f) | f = 1/T f = Frequency (in Hertz, Hz) T = Time period of one wave cycle (in seconds, s) |
| Wavelength (λ) | λ = v/f λ = Wavelength (in meters, m) v = Wave velocity (in meters per second, m/s) f = Frequency (in Hertz, Hz) |
| Period (T) | T = 1/fT = Period (in seconds, s) f = Frequency (in Hertz, Hz) |
| Intensity (I) | I = P/A P is the power A is the area. |
| Initial Velocity | Vi = Vf – at, |
| Work Done (Joule J) | W = Fs Force (N) x Displacement (m) |
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Oneof1
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