Please show all steps, with your nal answer including units and directions when necessary. Signicant digits, units, directions, and therefore statements are all required! 1. A roller coaster car is near the bottom of its track, as shown below. At this point, the normal force on the roller coaster is 3.5 times its weight. The speed of the roller coaster is 26 m/s. Determine the radius of the track's curvature, and the frequency of circular motion conducted