Physics Formula Sheet 19-20
Main Equa on
Variables
F g => weight
m=>mass
g=>accelera on due to
gravity
= F 1 + F 2 + ..
F-> Force
F g = mg
ΣF = F N et
v=
d
t
v=>velocity(speed)
d=>distance
t=> me
Versions of Main
Equa on
m=
d = vt
t=
a = ∆v /∆t
∆v = v f − v i
a=
v av =
v f −v i
∆t
v f +v i
2
Special Case
d = 21 at2
Free fall
v = gt
Free fall
d = 21 gt2
a=>accelera on
∆v => change
in velocity(speed)
∆t => change in time
∆v => change
in velocity(speed)
v f => f inal velocity
v i => initial velocity
a=>accelera on
v i => initial velocity
v f => f inal velocity
∆t => change in time
Fg
g
SI Units
F g => N ewtons (N )
m=>kg
d=> meters(m)
t=> seconds(s)
v=>m/s
d
v
at = ∆v
a=>m/s2
v=>m/s
t=> s
t = ∆v /a
v=>m/s
v f = Δv + v i
v f = v i + a∆t
v=>m/s
a=>m/s2
t=> s
only when the accelera on is
constant
v av =>average velocity
d=>distance
a=>accelera on
t=> me
only if vi=0
v=>velocity
g=>accelera on due to
gravity
t=> me
d=>distance
g=>accelera on due to
gravity
t=> me
t=
√
2d
a
t=v/g
t=
√
2d
g
t=> s
d=> m
a=m/s2
t=> s
v=>m/s
g=10m/s2
t=> s
d=> m
g=10m/s2
F net = ma
P =
F
A
F net => net f orce
m=>mass
a=>accelera on
P=>Pressure
F=>Force
A=>Area
m=
F net
a
a=
F net
m
F=PA
F net
m=>kg
=> N ewton (N )
a=>m/s2
F=>N
A=>m2
P=>Pa (Pascal)(N/m2)
A=F/P
p=mv
J=Ft
p=>momentum
m=>mass
v=velocity
J=>Impulse
F=>Force
t=> me
m=
p
v
v=
p
m
F =
J
t
t=
J = ∆p
W = Fd
P=W/t
J=>Impulse
∆p =>
change in momentum
W=>Work
F=>Force
d=>distance
P=>Power
W=>Work
t=> me
p=>kgm/s
m=>kg
v=>m/s
J=N*s
F=>N
t=>s
J
F
p=>kgm/s
J=N*s
F =
W
d
d=
W
F
W=Pt
W=>J (Joules)
F=>N
d=>m
W=>J
P=>W (Wa s)
t=>s
t=W/P
PE=mgh
PE=>Poten al Energy
m=>mass
h=>height
m=PE/gh
h=PE/gm
PE=>J
m=>mass
h=>height
KE =
1
2
2 mv
KE=>Kine c Energy
m=>mass
v=velocity
m=
v=
Fg =
Fe =
Gm1 m2
d2
kq 1 q 2
d2
T =
1
f
T = time/cycle
Fg=>Gravita onal Force
m=>mass
d=>distance
G=>Gravita onal
Constant
Fe=Electrical Force
q=>charge
d=>distance
k=>Electric Constant
T=>Period
f=>Frequency
2KE
v2
√
f=
KE=>J
m=>kg
v=>m/s
2KE
m
1
T
F=>N
m=>kg
d=>m
G=> 6.67x10-11
F=>N
q=>C(Coulombs)
d=>m
k=> 9.0x109
T=>s
f=>Hz (Hertz)
T=> Period
T=>s
f=> frequency
f=> Hz
v => wave speed
f => f requency
λ => wavelength
f=>Hz
v=>m/s
λ => m
f= cycles/ me
v = fλ
f = v /λ
λ = v /f