Question

On july 19, 1969, apollo 11's revolution around the moon was adjusted to an average orbit of 111 km. the radius of the moon is 1785 km, and the mass of the moon is 7.3 â 1022 kg. (a) how many minutes did apollo 11 take to orbit the moon once? incorrect: your answer is incorrect. min (b) at what velocity did apollo 11 orbit the moon?

Answer 1

Check the attached file for the answer.

Answer 2

a. at what velocity did apollo 11 orbit the moon?

h = 111 Km = 1.11 x106 m

Rm = 1785 Km = 1.785 x 103 m

Mm =  

r = Rm  + h = 1.896 x 103 m

v = (GM/r)0.5

= {(6.67 x 10-11) (7.36 x 1022 Kg) /1.896 x 103 m}0.5

= 1610 m/s

b. How many minutes did it take to orbit once?

v = ((2 (3.14) r)/T)

1610 = 2 (3.14) (1.896 x 103 m)/T

T = 123 min