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Terms in this set (57)
location relative to reference point.
rate of change of displacement.
rate of change of velocity
Newton's Ist Law:
velocity stays the same unless a force acts.
Newton's 2nd Law:
acceleration is force divided by mass
Newton's 3rd Law:
for every action force there is an equal & opposite reaction force
Newton's Law of Gravity:
force proportional to product of masses, divided by distance squared
gravitational force acting on an object.
perpendicular component of the force that a surface exerts on an object.
a force between two surfaces which acts to resist motion
a reaction force exerted by a stretched string
zero acceleration, no net external force, (no net Torque.)
time taken for a motion, such as circular (or SHM), to repeat itself.
number of cycles per second
number of radians per second (also called angular velocity)
acceleration of an object on a circular path
force needed to keep an object on a circular path.
Kepler's 3rd Law:
period of orbiting body squared is proportional to distance cubed.
is done when a force acts through a distance.
the ability to do work
energy an object has due to its velocity
energy an object has due to its position.
KE plus PE.
no work done moving object around a closed path.
Conservation of Mechanical Energy:
stays the same provided there are only conservative forces
5Conservation of Energy:
cannot be created or destroyed, only converted from one form to another
rate of work.
mass multiplied by velocity
Newton's 2nd Law (version 2):
force equals the rate of change of momentum.
change in momentum.
Conservation of Momentum:
total linear momentum stays constant, provided no net external force
provided momentum conserved AND KE conserved, clean bounce.
momentum conserved but KE not conserved, objects deform or stick
rotational force, perpendicular component of force by distance from turning point.
Centre of Mass:
point at which an extended body's mass appears as if it was concentrated.
force which is proportional to displacement but opposite in sign.
force required to stretch/compress a spring by one metre
Simple Harmonic Motion (SHM):
motion of object subject to a restoring force
force per unit cross-sectional area.
fractional increase in length
stress over strain
mass per unit volume
force per unit area.
pressure applied to an enclosed fluid is tran smitted undiminished to every point.
buoyant force equals weight of the displaced fluid.
a measure of hotness or coldness related to energy of microscopic particle motions
energy that flows from a hot body to a cold body
Coefficient of Linear (Volume) Thermal Expansion:
fractional change in length (volume) per Kelvin
Specific Heat Capacity:
heat required to raise the temperature of lkg of a substanc e by 1K
Specific Latent Heat:
heat required to change the phase of Ikg of a substance without changing temperature
change heat transferred by bulk movement of fluid
heat transferred directly through material with out any bulk mov ement.
a measure of the ability of a material to conduct heat.
heat transferred by electromagnetic waves
number of atoms in 12g of C-12
amount of substance that contains Avogadro's number of particles
low density , no interactions between particles , elastic collisions
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