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Physics 1

Terms in this set (19)

weight
force a body exerts due to the pull of gravity
mass
the measure of the amount of matter in a body
density is
mass per unit volume
density=
mass/volume
friction is
a force that opposes motion
air resistance or drag
occurs when the object moves through air or fluid
friction acts in the
opposite direction of the motion of object
1st law
a body will remain at rest or move at a constant velocity if the resultant force acting on the body is zero
balanced forces exist when
two forces act in opposite directions but are the same size
2nd law
if a resultant force acts on a body the body will not remain at rest or move at constant velocity, it will accelerate
distance is
the total amount of ground covered
displacement is
shortest distance from start to finish in a certain direction
speed is
rate of change of distance
velocity is
rate of change in displacement
acceleration is
rate of change in velocity
acceleration=
velocity/time
unit of acceleration
m/s²
momentum depends on
mass
velocity
average velocity=
total displacement/total time
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