Multiple choice While in orbit, shuttles traveled around the Earth at ________ to remain in orbit. 500 mph (800 km/h) 17,500 mph (28,200 km/h) 1,500 mph (2,400 km/h) 5,000 mph (8,000 km/h) Reveal answer Fill a bubble to check yourself B Correct answer Explanation To maintain a stable low Earth orbit, the Space Shuttle had to travel at approximately 17,500 mph to balance gravitational pull with centrifugal force.