| Question |
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| Answer |
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| acceleration |
The rate at which velocity increases in a given amount of time.
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| action-at-a-distance forces |
Forces that act on an object without touching it.
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| action-reaction principle |
For every action there is an equal and opposite reaction.
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| average speed |
Realistically vehicles speed is not constant, so this is what |
| displacement |
A change in position of an object. |
| dynamics |
The branch of mechanics that describes why things move.
|
| frame of reference |
A system of reference points from which the position and motion of an object can be determined. |
| geostationary orbit |
An object in the sky is orbiting at the same period as the surface of the earth below it so it seems to be stationary. |
| gravity (g) |
The attraction that any object in the universe has toward other objects in the universe.
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| inertia |
The property of matter that causes objects to resist change in the state of motion.
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| kinematics |
The branch of mechanics that describes how things move. |
| magnitude |
how big |
| mechanics |
The study of motion. |
| newton (N) |
The metric unit of weight. |
| satellites |
Celestial bodies in orbit around another celestial body. |
| scalars |
Quantities that express magnitude only. |
| speed |
The rate at which an object changes position. |
| terminal velocity |
The limit of the velocity at which an object can fall through a gas or a liquid.
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| Universal Law of Gravitation |
This law created by Newton states that the force of gravity is directly related to the product of the masses of the two bodies and inversely related to the relative distance between the objects squared. F=G((m1*m2)/D squared) |
| vectors |
Quantities that express magnitude and direction. |
| velocity |
The rate at which an object changes position in a specified direction.
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| weight |
The measure of the force of gravity on an object. |
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