If the torque applied to a lever arm is 3200 Nm and the 130 N force is 45 degrees to the lever arm; then what is the lever arm? The formula is T= (r)(F)Sin(0).
3200 Nm= (r)(130 N) Sin(45).
Please help, and thanks :)

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)