Tarzan swings on a 40m long vine intially inclined at an angle of 40 degrees with the vertical. Acceleration of gravity = 9.81 m/s^2. What is his speed at the bottom of the swing if he starts from rest? i started by drawing a diagram. and then i used trig to find the distance between the intial position and the bottom of the path. then i tried to plug that into a kinematics equation i think, but it didn't work. i used something like Vf^2=Vi^2+ad help would be great appreciated. thanks.