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Symbolic expression for fx(x): 0<x<L/2 : rho_1*g*A L/2<x<L : rho_2*g*A Symbolic expression for N(x): 0<x<L/2 : rho_2*g*A*L/2 L/2<x<L : rho_2*g*A*(L-x)

u1 = -a*L*x1; u2 = 2*a*(x2.^2-L*x2);

N1 = -3*a*L*A*E+0*x1; N2 = 6*a*A*E*(2*x2-L);

fx1 = 0 + 0*x1; fx2 = -12*a*A*E + 0*x2;

Fx = -3*a*L*A*E x = L/2

Rx(B) = 3*a*A*E*L Rx(C) = 6*a*A*E*L

For for 2L/3 ≤ x ≤ L: N(x) = p_0*2*L/27 u(x) = p_0*2*L/(27*E*A)*(x-L)

For for 2L/3 ≤ x ≤ L: N(x) = p_0*2*L/27 u(x) = p_0*2*L/(27*E*A)*(x-L) Anybody for the fist part (0 ≤ x ≤ 2L/3)