Selam👋 Phy is killing me Other subjects are so easy satenachew fetenam sisera katenahu i will score good grades but phy satenaw aymecheg simarew aymecheg sifetenew ema ...... Any hoo ahun mat tefetag nege phy witeaten eyaweredebig newe mn ladrig guys help beteley ye phy geek kehonachu ..😜 and tnx
May 29, 2022Sry but this may help u bruh😂😂 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
May 29, 2022