physics help?

Question

Tarzan needs to cross a river. He grabs the lower end of a 4.4 m long vine initially hanging at 36 degrees from the vertical and pushes off with an initial speed of 4.4 m/s. What is Tarzan's speed at the lowest point of his swing on the vine (in m/s)? Neglect frictional forces and g=9.8 m/s/s.

Answer 1

v1 = 4.4, h = 4.4 * (1 - cos(36))
1/2 mv1^2 + mgh = 1/2 mv2^2
v1^2 + 2hg = v2^2
19.36 + 16.47 = 35.83 = v2^2
v2 = 6.0 m/s