| A | B |
|---|
| Tangential velocity | Velocity parallel to the Earth's surface |
| Vestibular sense | Depends on the body's ability to detect acelertation and orientatation in a gravitational field |
| Gravitationa force | Depends on the product of the two masses attracting and is inversely proportional to the square of the distance between them |
| Semicircular canals (in the ear) | Detect rotational motion |
| Otolith organs (in the ear) | Detect linar acceleration of the head and head tilt |
| Center of gravity | The point on an object where an upward force would be balanced by the gravitational force |
| Centripetal force | Any force that causes an object to maintain a circular path |
| Path of a projectile | Parabola |
| Kepler's 1st Law | The path's of the planets are ellipes, with the sun at one focus |
| Kepler's 2nd Law | An imgaginary line from the sun to a planet sweeps out equal areas in equal time |
| Kepler's 3rd Law | The square of the ratio of the periods of any two planets revolving about the sun is equal to the cube of the ratio of their average distances from the sun |
| Projectile motion | The motion produced when an object has an initial velocity and the ony other force acting on it is gravity |
