A 75kg man swings from a vine at an angle of 35 degrees with thevertical. He grabs the vine with an initial speed of 2.5 m/s, andthe vine is 5.3 m long.
a) What is his initial mechanical energy?
b) What is his speed at the bottom of the swing?
c) If his speed if 2.5 m/s at the bottom of the swing, howmuch work was done by friction?