Posted by **kelsey** on Friday, October 31, 2008 at 12:03am.

Based on the following data about planet X (which orbits around the Sun):

Planet X's distance from Sun = 3.6*1012 m

Planet X's radius = 2*106 m

Planet X's mass = 8.2*1022 kg

a.) Find gx, the size of the acceleration due to gravity on the surface of Planet X. m/s2

b.) What is the weight of a 10 kg mass on the surface of Planet X? N

(How does this compare to its weight on Earth?)

c.) How long would it take for a ball dropped from a height of 8 m to hit the ground? s

(How does this compare to the time it would take on Earth?)

d.) At 3 of Planet X's radii above the planet's surface, what is gx? m/s2

e.) Find the orbital speed of Planet X around the Sun. m/s

f.) How long is a year on Planet X? Express your answers in both seconds and Earth years:

s

Earth years

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