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Stack #4715457
| Question | Answer |
|---|---|
| force | push or pull |
| Net force | sum of all the forces acting on an object |
| Friction | force that opposes the sliding motion of two surfaces |
| Gravity | attractive force between any two objects that depends on masses |
| Field | region of space that has a physical quantity |
| weight | gravitational force exerted on an object |
| Newtons first law of motion | states that a constant velocity unless a unbalanced force acts on it |
| Inertia | tendency of a object to resist any change in its motion |
| Newtons 2nd law of motion | objects acceleration is in the same direction as the net force on the object is equal to the net force exerted on it divided by its mass |
| Newtons 3rd law of motion | when one object exerts a force on a second object the 2nd object exerts a force on the first that is equal in strength and opposite in direction |
| Air resistance- | friction like air force that opposes the motion of object that move through the air |
| Terminal velocity | maximum speed an object will reach when falling through air |
| Free fall | gravity is the only force acting on an object |
| Centipetal force | force exerted toward the center of a curved path |
| Law of conservation of momentum | if no external forces act on a group of object |