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K2=(M2g+T−f)sK_2 = (M_2 g + T - f)sK2=(M2g+T−f)s
K1+K2=(M2g−f)sK_1 + K_2 = (M_2 g - f)sK1+K2=(M2g−f)s
K1+K2=(M2g−f−T)sK_1 + K_2 = (M_2 g - f - T)sK1+K2=(M2g−f−T)s