Question 188786
{{{P[CR]=(n*pi^2*E*A)/((L/sqrt(I/A))^2)}}} Start with the given equation.



{{{P[CR]=(n*pi^2*E*A)/(L^2/(sqrt(I/A))^2)}}} Square each term



{{{P[CR]=(n*pi^2*E*A)/(L^2/(I/A))}}} Square the square root to eliminate it.



{{{P[CR]=(n*pi^2*E*A)/((A*L^2)/I)}}} Multiply the by the reciprocal



{{{P[CR]=(n*pi^2*E*A*I)/(A*L^2)}}} Multiply the by the reciprocal again



{{{P[CR]=(n*pi^2*E*cross(A)*I)/(cross(A)*L^2)}}} Cancel out like terms.



{{{P[CR]=(n*pi^2*E*I)/(L^2)}}} Simplify



From here, you can now solve for I