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.
6400+1250=satellite orbit radius=7650 C=2pi*r (Circumference formula) 7650*2=15300 15300pi=48,066.368 48066.368 is the circumference. It goes around the circumference once every 90 minutes, meaning every 90 minutes it travels 48066.368 km. 48066.368/90min=534.0707511102649 MINUTES: It's speed is 534.0708 km/min SECONDS: It's speed is 8.9012 km/sec