CH 2 - Motion Flashcards
(29 cards)
speed = ___ / ___
distance; time
velocity =
speed in a direction
magnitude of the velocity =
speed, or v
change in velocity / time
acceleration
Newton’s First Law of Motion
object will move in straight line at constant speed, and stationary object will remain at rest, unless acted upon by outside force
One word description of Newton’s first law
inertia
Newton’s 2nd law
Net force = mass x accel
Formula for Newton’s 2nd law
F = ma
Newton’s 3rd law of motion =
for every action there is an equal and opposite reaction
Formula for momentum
mass x velocity
Formula for work
force x displacement
in order for work to occur from a physics perspective, there must be force over some ___
distance
Energy = ability to __ __
do work
Power = rate at which ___ is done
work
two formulas for power
work / time AKA force x velocity
If we ignore friction, the relative amounts of ___ and ___ energy in a system can change, but total amount of ___ can’t change
kinetic; potential; energy
An object’s state depends on how its ___ are arranged
molecules
In fluid dynamics, a “fluid” can refer to:
a liquid or gas
amount of material placed into given volume
density
formula for density
mass / volume
degree to which object resists being deformed
stiffness
object’s ability to spring back to resting state once deforming forces removed
elasticity
change in length of material proportional to force applied to it =
Hooke’s Law
Force exerted by air molecules colliding against sides of container and opposite force exerted by container wall =
pressure
