The planet Mars requires 2.01 years to orbit the sun, which has a mass of 1.989 × 1030 kg,

in an almost circular trajectory.

Find the radius of the orbit of Mars as it

circles the sun. The gravitational constant is

6.672 × 10−11 N · m2

/kg2

Answer in units of m

Part 2:

Find the orbital speed of Mars as it circles the

sun.

Answer in units of m/s.