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12.1 Chemistry
Vocabulary Words
Question | Answer |
---|---|
force | a push or a pull that acts on an object |
newton | the SI unit for force, equal to the force that causes a 1-kilogram mass to accelerate at a rate of 1 meter per second squared |
net force | 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 force that acts on objects that are not moving |
sliding friction | a force that opposes the direction of motion of an object as it slides over a surface |
rolling friction | the friction force that acts on rolling objects |
fluid friction | a friction force that opposes the motion of an object through a fluid |
air resistance | fluid friction acting on an object moving through the air |
gravity | force that acts between any two masses |
terminal velocity | the constant velocity of a falling object when the force of air resistance equals the force of gravity |
projectile motion | motion of a falling object after it is given and initial forward velocity |