Question

Tarzan has foolishly gotten himself into another scrape with the animals and must be rescued once again by Jane. The 60.0kg Jane starts from rest at a height of 5.50m in the trees and swings down to the ground using a thin, but very rigid, 28.0kg vine 9.00m long. She arrives just in time to snatch the 72.0kg Tarzan from the jaws of an angry hippopotamus. What is Jane's (and the vine's) angular speed
a) just before she grabs tarzan. 1.19 rad/s
b) just after she grabs him.
c)How high will Tarzan and Jane go on their first swing after this daring rescue?

Answer 1

for b i tried using conservation of momentum in a prefectly elastic collision, i kept getting the wrong answer ):

Answer 2

If she grabs him, I don't think it's perfectly elastic collision. That means they would bounce off each other. =P Try inelastic.

Answer 3

angular momentum conserve so use \[I _{1} \omega _{1} = I _{2} \omega _{2}\]