Question-

The space shuttle orbits the Earth in a near-circular orbit at a constant speed at approximately 100 miles above the Earth's surface. If we assume that the centripetal acceleration is equal to the acceleration due to gravity at sea level (9.8 m/s2) and the orbital radius is equal to the radius of the Earth (6380km):

1) What is the average speed of the space shuttle?

2) How long does the space shuttle take to make one orbit around the earth?