Ok. For the second problem I have done the following:
(1^2) + (L^2) = (1.25^2) , solving this gives me that the mass is .75 m from the rod
Arctan(1/.72) = theta , theta = 53.13
Net horizontal force: (v^2)/R * m
Adding the horizontal components of the tension of both ropes and setting...
Ok. Thank you so much for the quick responses. You were extremely helpful. I believe I understand my error now. I was not considering the perpendicular component of acceleration necessary to maintain a circle. If I add that into account that gives me the following:
(normal force) = mgcos18 +...
Why can I not assume this? It was my understanding that the normal force is equal to the total force acting on the surface. Isn't the perpendicular component of gravity the only force acting on the surface?
Also, if I accept that I can't assume this, then I would be left with the following...
Homework Statement
A curve with a 125 radius on a level road is banked at the correct angle for a speed of 20. If an automobile rounds this curve at 30 , what is the minimum coefficient of static friction between tires and road needed to prevent skidding?
Homework Equations
F=ma...