Students usually think circular motions are a separate topic. However, circular motions belong to the broad applications of Newton's Laws, with the following specific features: (1) The direction of the centripetal acceleration is automatically known - it always points toward the center of the circle. (2) In problem solving, always choose one axis (either +x or +y) toward the center of the circle. (3) The magnitude of the centripetal acceleration has a special formula = v2/r To accommodate high speed in car race, the race track is BANKED. A car is making s left turn along a BANKED curve on an incline. You are viewing the car for its behind. The center of the circle is on the left side. Here the car doesn't reply on static friction. The car' mass is m = 920.0 kg , The magnitude of the gravitational acceleration is 9.80 m/s2 . The radis of the circle is r = 47.0 m . You will find the angle for a given speed v = 16.31 m/s Part A - Remember: weight is a force, which is a vector. Calculate its x- and y- components. Pay attention to what angle to use, which trignometrical functions to use, and the signs of the components.

A ty Center of FN circle +x W