Forces and Motion Vocab
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21 Terms
friction
a force that opposes the motion of objects that touch as they move past each other
gravity
a force that pulls objects toward each other
weight
a measure of the force of gravity on an object
mass
a measure of the amount of matter in an object
9.8 m/s/s
acceleration due to gravitational force
lubricants
materials that reduce friction
force
a push or pull on an object
gravity, electrical and magnetic
examples of non contact forces
mass and distance
2 factors that affect gravity
N (Newton)
unit for force and weight
types of surfaces and amount of mass
2 factors that affect friction
kilogram (kg)
unit for mass
strength and direction
2 ways forces are described
drag
Resistance of the air (or other fluid) against movement
sliding friction
friction that occurs when one solid surface slides over another
fluid friction
friction that occurs as an object moves through a liquid or a gas
static friction
friction that acts on objects that are not moving
rolling friction
friction that occurs when an object with wheels moves over a surface
decrease
How an increase in distance would affect the pull of gravity
weight
_______would change if on a different planet because of a change in gravity
mass
________would NOT change if on a different planet even though there is a change in gravity