compute the moon's centripetal acceleration in its orbit around the earth. Recall that the moon orbits the earth very 38 days and that it is about 240,000 miles from earth.
What force causes this acceleration?

Question

compute the moon's centripetal acceleration in its orbit around the earth. Recall that the moon orbits the earth very 38 days and that it is about 240,000 miles from earth. 
What force causes this acceleration?

noelgreco · Answer

38 days?

anonymous · Answer

T=30 days
R=240.000 miles
$\omega=2\pi/T$
$a_c=\omega^2R$
Gravity is the one behind all this :)

shamuta · Answer

Oh ok!
I thought the acceleration would be different cause I thought that gravity (9.81 m/s^2) only had to do with setting on/in Earth.
But your addition of formulas helped, so THANKS! :D

anonymous · Answer

No problem :)