2D Motion

5. the optimum angle of a projectile to reach the maximum range. (2 words)
7. Kepler's third law, the period squared divided by the semi-major axis ____ is a constant.
9. the rate of change of velocity
11. the interval of time required for a cyclic motion
14. the lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.
16. Kepler's _____law is known as the law of ellipses
17. the change in an object's position.
18. Kepler's second law is the equal areas in equal _____

1. the region of space surrounding a body in which another body experiences a force of attraction (2 words)
2. the energy of motion.
3. a sloping ramp up which heavy loads can be raised. (2 words)
4. the type of orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis,
6. the unit of force
8. the unit of energy
10. the speed of something in a given direction.
12. the acceleration due to gravity _____ as you move further away from the Earth.
13. ______force is a contact force applied by a surface on an object.
15. acceleration is defined as the property of the motion of an object traversing a circular path