The Moon orbits Earth every 27.3 days.
a)Determine the angular velocity of the moon, in deg per day and rad per day.
b)The radius of the orbit of the Moon is about 384400 km. How far does the Moon move along an arc of its orbit every day?
I got a, but I don't know how to do b.
Help please?

Question

The Moon orbits Earth every 27.3 days. 
a)Determine the angular velocity of the moon, in deg per day and rad per day.
b)The radius of the orbit of the Moon is about 384400 km. How far does the Moon move along an arc of its orbit every day?
I got a, but I don't know how to do b.
Help please?

anonymous · Answer

i have no idea....................:(

anonymous · Answer

Assuming that the orbit is circular you can use

integral (rdthetha) = r*thetha ... thetha would be in radians ..

anonymous · Answer

Oh

anonymous · Answer

or I can give a simpler method .. circumference of a circle is 2*pie*r  ..
now for a thetha movement --> length would be r * (thetha)/(2*pie) = r * degree (in radians)

wondermath · Answer

how do you find theta ?

anonymous · Answer

thetha is nothing but your angular velocity *time