|Jan11-09, 06:59 AM||#1|
Physics Energy Problem
1. The problem statement, all variables and given/known data
Vernie (mass of 50.0kg) needs to swing across a river to rescue George (mass of 80kg). She must swing into a constant horizontal wind force F ona vine that is initially at an angle of O with the verticle. The width of the river between them is 50.0m. The force of the wind blowing towards Vernie is 110N, and the length of the rope os 40.0m an dthe angle is 50 degrees.
(a.)With what minimum speed must Venie begin her swing in order to just make to the other side.
(b.) Once the rescue is complete, George and Vernie must swing back across the river, with what minimum speed must they begin their swing?
2. L-(Lcos50 deg)
3. The attempt at a solution
V= sqrt 2gh
|energy, kinetic, potential|
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