As shown in the figure, a 10.0 m long bar is attached by a f…

As shown in the figure, a 10.0 m long bar is attached by a frictionless hinge to a wall and held horizontal by a light rope that makes an angle θ with the bar. The bar is uniform and has a mass of 7 kg. What is the tension (T) in the rope when a 10.0 kg mass be suspended 4.2 cm from the hinge?