1. The problem statement, all variables and given/known data this is actually one of the physics problems and I have boiled down the numerical to two equations. But I have trouble manipulating equations 2. Relevant equations Tsin(theta)=Fcos(theta)-mg and Tcos(theta)=(mv^2/Lcos(theta))-Fsin(theta) F and T are the two unknowns 3. The attempt at a solution I brought the terms involving m to one side and the trig functions to the other and tried to add the the equations . But it only gets more complicated as in one eq F has a coefficient of cos(theta)+sin(theta) and in the other cos(theta)-sin(theta).same goes for coefficients of T in both equations.