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Equations Physics
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Gravity
Key Concepts:
Terms in this set (24)
speed
distance / time
s= d/t
kinetic energy
1/2 x mass x velocity squared
KE= 1/2 mv^2
gravitational potential energy
mass x gravitational field strength x height
GPE=mg∆h
density
mass / volume
ρ= mV
power
energy (work done) / time taken OR current x voltage
P=IV
weight
mass x gravitational field strength
acceleration
(final speed - initial speed) / time a= v-u / t
work done (energy transferred force)
force x distance (in the direction of the force)
pressure
force / area
Newton's second law
Force = Mass x Acceleration (F=ma)
wave speed
frequency x wavelength
( v = f λ )
Hooke's Law
Force = spring constant x extension F=kx
Boyle's Law
pressure x volume = constant
pV = k
Velocity
displacement/time
v= s/t
Current
charge/time
I= Q/t
Energy (other side power)
Power x time
E=Pt
Energy (current)
current x voltage x time
E=IVt
Voltage
current x resistance V= IR
Resistance in a series circuit
The sum of each component
R= R1+ R2+ R3+...
Resistance in a parallel circuit
1/Rt=1/R1+1/R2+1/R3
Energy (specific heat)
mass x specific heat capacity x change in temperature Q= mcΔT
Weight
mass x acceleration due to gravity
W=mg
Work done (energy/power)
Energy / time taken
P= W/t
Efficiency
η= useful energy / total energy x 100
η= useful power / total power x 100
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