19/05/2023
✅ QUICK REVISION ✅
✅ FORMULAS ✅
🎯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
