7.7 Fast-Moving Projectiles--Satellites

Satellite Speed

<p>Paul shows how a satellite's orbital speed in close Earth orbit relates to Earth's curvature. Duration: 7:04</p>

Circular Orbits

The faster an object moves sideways while falling, the wider its curvature of fall. At about 8 km/s, its curvature of fall matches the curvature of Earth, which allows the object to never touch the ground. Duration: 4:45.