Physics AP3 Flashcards
2 types of drag
air resistance and water resistance
how to reduce drag
streamlining
what affect can forces have on objects
change their motion, deform them
when you apply a force to a rope what is the name given to the force produced in the rope
tension
hookes law
in a spring if you double the force the extension doubles, extension is directly proportional to force
how do fluids exert pressure on a surface
because of collisions of the molecules with the surface
equation that links area force and pressure
pressure = force / area
pressure unit
n/m2
name given to turning effect of a force
moment
equation that links distance, force and moment
moment=distance x force
equation that links energy power and time
energy = power x time
equation that links distance moved, work done and force
work done = force x distance moved
unit for energy
joules
ways of transferring energy between stores
heating, radiation, forces, electricity
reasons why energy is lost in an energy transfer process
friction, air resistance, heating, electircal resistance
things that affect thermal energy of object
mass, temperature, what it is made of.
what does conduction occur in
solids
what does convection occur in
fluids
what do waves transfer
energy
is light a longitudinal or tranverse wave
transverse
equation links distance, speed and time
speed = distance / time
euation links gravatational field strength, mass and weight
weight = mass x gf
equation links current, potential difference and resistance
pd = current x resistance
equation links energy, power, time
power = energy / time
