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Physics
Chapter Four Vocab
22
Physics
12th Grade
10/26/2006

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Term
force
Definition
push or pull on an object
Term
contact force
Definition
force that arises from touching b/t two objects
Term
non contact force
Definition
force originating without the touching b/t two objects, such as gravitational force
Term
mass
Definition
an amount of matter
Term
Newton's first law
Definition
an object will maintain its inertia unless acted upon by an outside force
Term
inertia
Definition
object's tendency to remain continuously at rest or continuously in motion
Term
inertial reference frame
Definition
area surrounding an object which allows Newton's first law to be valid
Term
Newton's second law
Definition
a net force acted upon an object will cause that object to accelerate
Term
free body diagram
Definition
a vector diagram that shows forces acting on an object
Term
Newton's third law
Definition
when an object exerts force onto another object, the 2nd object exerts a force of equal magnitude but in the opposite direction
Term
fundamental forces
Definition
gravitational force
strong nuclear force
electroweak force
Term
gravitational force
Definition
force acting on an object due to the gravitational attraction b/t the object and the planet
Term
Newton's law of universal gravitaiton
Definition
attractive force b/t any two bodies tahat is directly proportional to mass and inversely proportional to the distance b/t the two bodies
Term
normal force
Definition
perpendicular force exerted by any surave in contact with an object
Term
apparent force
Definition
the force exerted by an object in an accelerated frame of reference
Term
friction
Definition
force that opposes motion due to imperfections b/t any surface and any object
Term
maximum static frictional force
Definition
the greatest friction a surface can present, just at the point of constant motion
Term
kinetic friction force
Definition
the amount of friction which must be overcome in order to maintain motion
Term
tension
Definition
name for a force usually associated w/ ropes or cables acting on an object
Term
weight
Definition
gravitational force due to earth
Term
lift
Definition
support force acting on an air born object
Term
thrust
Definition
force created by an engine in an airborn object
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