an earth satellite in circular orbit 1250 kilometers high makes one complete revolution evry 90 min. What is it linear speed? use 6400 kilometers for the radius of the earth.

Answer 1

the diameter of the orbit is 1250+6400 km
the distance it goes in 90 minutes is therefore
pi*(1250+6400) km
the speed is distance over time
pi*(1250+6400)/90 km/hr

Answer 2

okay but don't you have to multiply the (1250+6400) by pi and 2 then divide that by 90? i got 534.07 as an answer

Answer 3

Yes, sorry, I left the 2 out. circumference = 2 pi R

Answer 4

thank you!

Answer 5

the radius at which it rotates = 6400+1250
circumference = 2pi(r)
= 2(6400+1250)pi = 15300pi

rate = distance/time
= 15300pi/1.5 km/h
= 32044 km/hr