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science chap 3 voc
| Question | Answer |
|---|---|
| force | push or pull |
| net force | sum of all the forces acting on an object |
| friction | is the force that opposes the sliding motion of two surfaces that are touching each other |
| gravity | is an attractive force between many objects that depends on the masses of the objects and the distances between them |
| field | region of space that has a physical quantity at every point |
| weight | gravitational force on an object |
| newton's 1st law of motion | states that an object moves at a constant speed unless an unbalanced force is applied |
| inertia | the tendency of any object to resist change in its state of motion |
| newton's 2nd law of motion | states an objects acceleration is in the same direction as the net force on an object and is equal to the net force exerted on it divided by it's mass |
| newton's 3rd law of motion | states when one object exerts a force on a second object, the second object exerts a force on the first that is equal in strength in the opposite direction |
| air resistance | is a friction like force that opposes the motion of the objects that move through like air |
| terminal velocity | is the maximum speed an object will reach when falling through a subject like air |
| free fall | the motion of an object when gravity is the only force acting on it, |
| centripetal force | force exerted toward the center of a curved path |
| law conservation of momentum | if no external forces act on a group of objects , their total momentum does not change ; forces are equal in size and opposite in direction |
Created by:
sloancaston