A curve of radius 60m is banked so that a car traveling with uniform speed 70 km/hr can round the curve without relying on friction to keep it from slipping to its left or right. The acceleration of gravity is 9.8m/s^2. What is the angle of the curve? im using a=v^2/r, but when I get the acceleration, I don't know what to do no more.. i think it might be sin theta = g/a but im not sure.. can anyone check? thx in advance!