Physic 1 formula sheet, Cheat Sheet of Physics

Download Physic 1 formula sheet and more Cheat Sheet Physics in PDF only on Docsity! ‘O’ Level Physics Formula Sheet 1 Measurements Base SI Units Kg m s A K mol SI Unit for mass: Kilogram SI Unit for length: metre SI Unit for time: second SI Unit for current: Ampere SI Unit for Temperature: Kelvin SI Unit for Amount of substance: molar Number Prefix n (10-9) µ (10-6) m (10-3) c (10-2) d (10-1) K (103) M (106) nano micro milli centi deci Kilo Mega Kinematics Average Speed s = ∆d / ∆t Average Velocity v = ∆x/∆t Acceleration a = ∆v/∆t ∆d = total distance travelled (area under speed-time graph) ∆x = total displacement ∆t = total time taken ∆v = change in velocity Velocity (slope of displacement-time graph) Acceleration (slope of velocity-time graph) v = u + at x = ut + ½ at2 v2 = u2 + 2ax vfree fall = �2𝑔ℎ u = initial velocity v = final velocity t = time a = acceleration x = displacement h = height g = gravitational constant = 9.81 m/s2 Dynamics Newton’s First Law ∑ ?⃑?= 0 at equilibrium A body continues to stay in its state of rest or uniform motion in a straight line as long as there is no net force/moment acting on the body. Newton’s Second Law F= ma The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton’s Third Law For every force object A acts on object B, object B will exert an equal and opposite force on object A giving rise to Reaction/Normal Forces Resolving forces Fhorizontal = Fr cos Ө Fvertical = Fr sin Ө Mass, Weight, Density Weight w = mg w = Weight m = mass g = gravitational field strength Density ρ = m V ρ = density m = mass V = volume Turning effect of Force Moment of Force M = F d M = Moment F = force d = ⊥ distance from force to pivot Principle of Moment Σ Anticlockwise Moment = Σ Clockwise Moment For a body in rotational equilibrium, Sum of ACW Moment = sum of CW Moment Pressure Pressure 𝐏 = F A P = Pressure F = Force over area, A A = Area Pressure of liquid column P = hρg P = Pressure ρ = density, h = height of liquid column g = gravitational field strength. Energy, Work and Power Work Done W = Fd W = work done F= force d= distance in direction of force Power P = W/t = Fv Work done per unit time, t Kinetic Energy 𝐄𝐤 = 1 2 mv2 Ek = Kinetic Energy m = mass v = velocity Gravitational Potential Energy Ep = mgh g = gravity =9.81 m/s h = height m = mass Conservation of Energy E1 = E2 E1 = Total Energy Before E2 = Total Energy After Energy cannot be created or destroyed. It can only be transformed or converted into other forms. Kinetic Model of Matter Ideal Gas Law PV ∞ T P1V1 = P2V2 P = pressure of fixed mass of gas V = volume occupies by fixed mass of gas T = Temperature of gas Subscript 1 = initial state Subscript 2 = final state Thermal Properties of Matter Specific Heat Capacity E = m c ∆T c = Specific heat capacity (Energy required to raise the temperature of 1kg of the object by 1 °C) m = mass ∆T = change in temperature. Latent Heat For melting, E = m Lfusion For boiling, E = m Lvaporization Lfusion = latent heat of fusion (Energy required to change 1kg of solid to liquid at the constant temp) Lvaporization = latent heat of vaporization (Energy required to change 1kg of liquid to gas at the constant temp) m = mass General Wave Properties Wave Velocity v = f λ v = velocity of a wave f = frequency λ = wavelength Wave frequency f = 1 T T = Period f = frequency Fhorizontal Fvertical Fr Ө