Calculate the average speed of the moon around the earth. the moon has a period of revolution of 27.3 days and an average distance from the earth of 3.84 × 108 m. 1. 2054.6 m/s 2. 2045.8 m/s 3. none of these 4. 8.83789 × 107 m/s 5. 3688.5 m/s 6. 3.68245 × 106 m/s 7. 1022.9 m/s 8. 584000 m/s 9. 61374.2 m/s

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.