A person travels on a ski lift (Fig. P4.82). 

(a) If the support strut on the ski lift makes an angle θ = 15°, what is the horizontal acceleration of the person? 

(b) If the person plus the lift chair have a combined mass m = 120 kg, what is the tension force along the support strut? Assume the ski lift is moving horizontally. For simplicity, when considering forces involving the support strut, you can treat the strut in the same way as you would treat a mass less cable.

Figure P4.82