A boy is standing in the middle of a field when his friend sprints past him with a speed of 4 m/s. At the moment his friend passes him, he starts running with an acceleration of 0.8 m/s2. 1. How long will it take him to catch his friend?

2. How far will he have to run?

3. How fast will he be going?

Use the ratio form of kepler’s third law, = , and the data provided to determine the time it takes mars to orbit the sun. round your answer to the nearest tenth. earth’s orbital period = 1.0 earth year earth’s distance from the sun = 1.0 au mars’s distance from the sun = 1.5 au it takes mars about ⇒ 1.8 earth years to orbit the sun.