Formulas related to energy and work Fd = k.e mgh = 1/2 mv² | ❗STUDY HUB ❗( NEET / JEE )M
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
