3. A 1.20 m long board of uniform density and mass 9.00 kg is attached to a vertical wall at an angle of 35.0 with respect to the horizontal. A light string is attached to the board 0.300 m from the free end of the board. This string is also attached to the wall and makes an angle of 15.0 with respect to the horizontal as shown. a. What is the tension in the string? T-F=ma Tsin(50) ma Tsino) (9.00) (98) T= Hinge 35 15 T 50 b. What is the vertical component of the force that the wall exerts on the board? S