PPSC Preparation
PHYSICS FORMULAS For PPSC
🎯1. Formulas related to force:
🗯️F = ma
🗯️F = kx
🗯️F = m(vf² – vi²/2S)
🗯️F = mv/t
🗯️F = md/t²
🗯️F = m(vf – vi)/t
🗯️F = Area × density × velocity²
🗯️F = 1/2 mv²/d
🗯️F = 1/2 Pv/d
🗯️F = Power/velocity
🗯️Fc = mv²/r
🗯️Fc = mrw²
🗯️Fc/2 = mv²/2r
🗯️Fc = 2K.E/r
🗯️F = Area × Stress
🗯️F = pir² × stress
🗯️F = YA × Strain
🗯️F = YAl/L
🗯️F = pressure × area
🗯️F = change in momentum × time interval
🗯️F = – 2mVx × Vx/2l
🗯️F2 = F1/A1 × A2
🗯️F = qE
🗯️F = kQ/r²
🗯️F = ILB sintheta
🗯️F = q (v × B)
🗯️F = qE + q(v × B)
🎯2. Formulas related to energy and work
👉Fd = k.e
👉mgh = 1/2 mv²
👉E = 1/2 kx²
👉E = Ve
👉E = nhf
👉E = nhc/lambda
👉E = Pc
👉K.e = hf – work function = hf – hf° = hf – hc/w° (here w° is cutt off wavelength)
👉E = 1/2 Pv
👉mv²/2r= Fc/2
👉K.E/r = Fc/2
👉K.E = Fc×/r/2
👉K.e = 1.5 KT
👉E = VQ
👉E = Power × time
👉E = Fvt
👉% loss in K.e = v1² – v2²/v1² × 100
👉% loss in P.e = h1² – h²/h1² × 100
👉Energy lost due to air friction(Fh) = 1/2mv² – mgh (when body is thrown upward)
👉Energy lost due to air friction(FS) = mgh – 1/2mv² (when body is thrown downward)
👉E = 1/2 CV² (capacitor)
👉E = R × hc (R is Rydberg’ constant)
J = m-¹ × Js ms-¹
👉hf kalpha x rays = EL – Ek
hf kbeta x rays = EM – Ek
👉Binding energy = mass defect × c²
👉W = Fd Costheta
👉W = nmgh (when person is climbing stairs)
👉W = n(m+m) gh (when person is climbing stairs with some load)
👉W = 0mgh + 1mgh + 2mgh + 3mgh ……. (in case of stacking bricks. For ist brick h=0. For 2nd brick h=1. For 3rd brick h=2 and so on)
👉W = Fd = PA × change in V
👉W = Q – change in U
👉Q = mc × change in T
T/273.16 = Q/Q3 (Thermodynamic scale)
👉W = I²Rt
👉W = emf×charge
👉W = VQ
👉W = 1/2 lF
👉W = YAl²/2L
👉W = StressAl²/2Strain
👉W = PressureAl²/2Strain
👉W = Fl²/2Strain
🎯3. Formulas related to Power
💥P = Fv
💥P = E/t
💥P = n(mgh/t)
💥P = Fd/t
💥P = mv²/2t
🎯4. Formulas related to distance, displacement, velocity and accelration
📝d = vt
📝d = at²
📝d = (vf + vi/2) ×t
📝d = 5t² (for distance in ‘n’ seconds)
📝d = 5(2tn – 1) (for distance in ‘nth’ second)
📝d = 1/2 mv²/F
📝d = vit + 5t²
📝d = v × underroot 2H/g
📝d = vt = x°wt = x°2pi/T × t = x°2pift
📝x = x° Sin wt
📝x = x° Sin (underroot k/m) t
vf = vi + at
📝2as = vf² – vi²
📝2as = (vi + at)² – vi²
📝2as = vf² – (vf – at) ²
📝v = underroot Vfx² + Vfy²
📝v = Power/Force
📝v = 2×K.E/momentum (k.e = 1/2 Pv)
📝v² = 2×Power×time/mass (P = mv²/2t)
v = underroot 2as
v = underroot gr (speed at highest point in a verticle circle)
v = underroot 5gr (speed at lowest point in a verticle circle)
📝v² = 2FS/m
📝v² = 2E/m
📝v² = 2Ve/m
📝v = eBr/m (velocity of particle under action of magnetic force along circular path)
📝v² = Force/Area.Density
📝v = w underroot x°² – x²
📝v = underroot k/m × underroot x°² – x²
📝v = x°w (at mean position where x=0)
📝v = x° underoot k/m
📝v = v° u*HEAD: ~Sirajsoomro *
*PHYSICS FORMULAS*
📝v = v° underroot 1 – x²/x°² (for determining ratio b/w inst. Velocity and maxi. Velocity)
📝v= x°2pif = x°2pi/T
📝a = x°w²nderroot 1 – x²/x°² (for determining ratio b/w inst. Velocity and maxi. Velocity)
📝a = x°w²
