Use the following information to answer the next question. Statements About Circular Motion I The direction of the velocity is tangential to the circumference of the circle. II The direction of the acceleration is perpendicular to the direction of the velocity. III The direction of the net force acting on the object is radially outward. 12. Which of the above is false for an object that moves in a circular path at a constant speed? A. II and III B. I and II C. I and III D. III only Numerical Response 6. A 15.0g solution in a test tube is placed in a centrifuge that spins at a rate of 250 Hz. If the radius of the circular motion is 120 cm, the centripetal force exerted on the solution, expressed in scientific notation, is a.bctimes 10^dN. The values of a b,c,and d are __ __ __ and __ Record all four digits of your answer in the numerical-response section on the answer sheet. 13. A record spins with a frequency of 45.0 rpm. If the diameter of the record is 17.8 cm, the centripetal acceleration of the pedal is 1.98m/s^2 B. 3.95m/s^2 C. 6.25m/s^2 D. 12.5m/s^2 Use the following information to answer the next question. Statements About Planetary Motion I Planets move in elliptical orbits about the Sun. II Planets move such that in equal periods of time a line from the Sun to the planet sweeps out equal areas. III The speed of a planet is greatest when it is farthest from the Sun. 14. Which of the above statements are predicted by Kepler's laws for the motion of planets orbiting the Su A. I and II B. II and III C. I and III D. I, II and III