Ch5_2 #1

See Sheet 12 and replace the box at the top with the car inside the circle, held in orbit by the Centripetal Force which is the vector sum of the Normal Force by the track and the gravitational force at the top of the circle. Write down this vector equation paying attention to the relative signs of the vectors. The apparent weight is the Normal Force. Set it equal to the regular weight ("true" weight). Take the direction of the centripetal force as positive. Solve for the speed. Watch out , the diameter of the loop-the-loop is given, not the radius.