Discuss the below:
Work and energy
Q: Jane, whose mass is 50.0kg, needs to swing accross a river(having width of D) filled with man-eating crocodiles to save Taezan from danger. She must swing into a wind exerting a constant horizontal force F on a vine having a length L and initially making an angle (theta) with the vertical.
Taking D=50.0m F=110 N L=40.0m and theta= 50.0 degrees
(a) With what minimum speed must Jane begin her swing in order to just make it to the other side? (b) Once the rescue is complete, Tarzan and Jane must swing back across the river . With what maximum speed must they begin their swing? Assume Tarzan has a mass of 80.0kg