- #1
Bones
- 108
- 0
Homework Statement
Consider a planet that rotates one revolution in one day and orbits a star in one year. The planet has mass = 5.6 1024 kg, radius = 6.7 106 m, and is 1.7 1011 km from the star.
(a) Determine the angular momentum for the rotating planet about its rotation axis (assume a uniform sphere).
kg · m2/s
(b) Determine the angular momentum for the planet in its orbit around its star (treat the planet as a particle orbiting the star).
kg · m2/s
Homework Equations
The Attempt at a Solution
I started this problem, but I am not sure how to do part b.
a)
I=2/5MR^2
I=2/5(5.6*10^24)(6.7*10^6)^2
I=1.01*10^38
w=1rev/day*2pi/1rev*1day/24hrs*1hr/60min*1min/60sec=7.27*10^-5
L=Iw
L=(1.01*10^38)(7.27*10^-5)
L=7.34*10^33