Over a time interval of 2.16 years, the velocity of a planet orbiting a distant star reverses direction, changing from 120.9 km/s to 218.5 km/s. Find
(a) The total change in the planet s velocity (in m/s) and
(b) Its average acceleration (in m/s2) during this interval. Include the correct algebraic sign with your answers to convey the directions of the velocity and the acceleration? |

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