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Physics Final - January 21, 2016

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vepikuno's version from 2016-01-21 12:12

Section

Question Answer
momentum unitm/s
area underneath graphapplied force
p = mvone object
p before = p aftertwo objects
p before = p afterexplosions
p before = p aftercollisions
J = F net t = delta p = m delta vsomething changes about the object
J = F net t = delta p = m delta vimpulse
work unitjoules
power unitwatts
pulling a box or sledcos theta
work can bepotential or kinetic
PEgg = 9.81
PEgvertical
PEggravitational potential energy
PEgheight
PEglifting
PEsspring
PEg unitjoules
two objects in kinetic energyadd the masses
KE graph is acurve
what is x in PEs=1/2kxelongation
what is x in PEs=1/2kxchange in length from equilibrium
what is x in PEs=1/2kxcompression
ballchange in velocity
kguse 9.81
final and initialfinal-inital
friction problemssteals, subtract the difference
total mechanical energyremains the same
velocitykinetic energy
falls freelyuse 9.81
Newtonsthe force
impulse unitn/s
massscalar
acceleration is lessyou weigh less
acceleration is moreyou weigh more
gravitational potential energyonly depends on height
gravitational potential energydoes not change if the height does not change
mass of a student60 kg/600 N
distanceshaded area under velocity/time graph
massnet weight
massinertia
mechanical energyPEg+PEs+KE
F∥arrow down left (before)
F⟂arrow down right (after)
memorize