Hi, I have a few questions, thanks for any help you can give!!!! 1. If a wheel is rotating at a rate of 3.1 revolutions every 3.6 seconds. Through what angle, in radians, does the wheel rotate in 1 second?? 2. A car can negotiate an unbanked curve safely at a certain maximum speed when the coefficient of static friction between the tires and the ground is 0.85. At what angle should the same curve be banked for the car to negotiate the curve safely at the same maximum speed without relying on friction? 3. A 0.073 kg arrow is fired horizontally. The bowstring exerts an average force of 60N on the arrow over a distance of 0.78m. With what speed does the arrow leave the bow? (for this one, i used the formula 1/2mv^2, but did not get the correct answer, maybe i'm using the incorrect formula) Thanks!