Q1:

A computer is reading data from a rotating CD-ROM. At a point that is 0.0366 m from the center of the disk, the centripetal acceleration is 391 m/sz. What is the centripetal acceleration at a point that is 0.0834 m from the center of the disc? Number l Units 4} The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the speed and centripetal acceleration of a person situated (a) at the equator and (b) at a latitude of 18.0 north of the equator. [j] [:1] A "swing" ride at a carnival consists of chairs that are swung in a circle by 11.5 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 224 kg. (a) Determine the tension in the cable attached to the chair. (b) Find the speed of the chair. On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 165 m, as the drawing illustrates. The height of the outer wall is 15.2 m. Find (a) the smallest and (b) the largest speed at which cars can move on this track without relying on friction. A motorcycle has a constant speed of 25.9 m/s as it passes over the top of a hill whose radius of curvature is 144 m. The mass of the motorcycle and driver is 339 kg. Find the magnitude of (a) the centripetal force and (b) the normal force that acts on the cycle. (a) Number I Units 4} (b) Number l Units 4}