2012 Physics Unit Vocabulary
tells us how fast something is going. distance divided by time
tells us how fast AND which way somthing is going.
the rate at which velocity changes
unit of speed or velocity
meters, centimeters, inches, feet
unit of distance
a push or pull on a object
the force that opposes the motion of an object
A type of fluid friction
When the net force = 0 newtons. An object is not moving or moving at a constant velocity at this time
when the net force does not = 0.
a force that opposes the direction of motion of an object as it slides over a surface
friction that occurs when an object rolls over a surface
friction that acts on objects that are not moving
friction that occurs as an object moves through a fluid (includes water, air)
The tendency of an object to resist change in its state of motion
Newton's First Law
Objects and rest tend to stay at rest. Objects in motion tend to stay in motion, unless acted on by an unbalanced force.
Newton's Second Law
The acceleration of an object depends on the mass of the object and the amount of force applied. F=m*a
the downward pull on an object on Earth
Newton's Third Law
For every action there is an equal and opposite reaction.
Unit of force
Acceleration of gravity
9.8m/s2 on earth
meters per second squared (m/s2)
unit of acceleration
unit of mass
a quantity that has magnitude and direction
the force that a surface exerts on an object that is pressing on it
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