Chapter 12.1 Mr. Meany
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15 terms
Terms | Definitions |
|---|---|
 newton's first law | object will remain at rest or in a uniform motion in a straight line unless acted upon by an unbalanced force |
| newton's second law | the acceleration of an object depends upon its mass and the magnitude of the force applied to it. F=ma |
| newton's third law | for every action, there is an equal and opposite reaction |
| Force | push or pull that acts on an object |
| newton | the force that causes a 1 kilgram to accelerate at a rate of 1 meter per second |
| net force | the overall force acting on an object after all the forces are combined |
| friction | a force that opposes the motion of objects that touch as they move past each other |
| static friction | the friction that acts on nonmoving objects. |
| sliding friction | force that opposes sliding of an object. |
| rolling friction | about 100-1000 times less than the force of static or sliding friction |
| fluid friction | force of the fluid (water, air) against the object's movement |
| air resistance | fluid friction acting on an object moving through the air |
| gravity | a force that acts between two masses |
| terminal velocity | the constant velocity of a falling object when the force of air resistance equals the force of gravity |
| projectile motion | the motion of a falling object after it is given an initial forward velocity |
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