In Fig. 6-44a, a sled is held on an inclined plane by a cord pulling directly up the plane. The sled is to be on the verge of moving up the plane. In Fig. 6-44h, the magnitude F required of the cord's force on the sled is plotted versus a range of values for the coefficient of static friction u between sled and plane: `F_(1) 2.0 N, F_(2)= 5.0 N, and mu_(2) = 0.25`. At what angle `theta` is the plane inclined?

Explanation

`9.5^(@)`