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Physics IX Cheat Sheet by

Formula sheet for students of class IX

MOTION

displa­cement
m
distance
m
speed
m/s
velocity
m/s
aceler­ation
m/s2
speed (v) = s/t
average speed = total s/total t
velocity = d/t
average velocity = total d/total t
accele­ration = v-u/t
v = 2πr/t
v = u+at
s = ut+1/2at2
v2 = u2+2as

Distan­ce-Time Graphs

Distan­ce-Time Graphs

Veloci­ty-Time Graphs

 

FORCE AND LAWS OF MOTION

inertia
kg
force
kgm/s2 or N
momentum
kgm/s
mass
kg
F = ma
p = mv
change in momentum = mv-mu
m
1
v
1
+m
2
v
2
=(m
1
m
2
)v

GRAVIT­ATION

weight
N
mass
kg
pressure
Pa or N/m2
accele­ration due to gravity
m/s2
density
g/cm3
F = GMm/d2
g = GM/R2
W = mg
W
m
= 1/6 W
e

(thrust) F = mg
Weight­-up­thrust = m
W = m+upthrust
h = 1/2gt2
v2 = 2gh
v = gt
 

WORK AND ENERGY

work
J
energy
J
power
W
work = Fs
E
p
= mgh
E
k
= 1/2mv2
power = W/t /// power = E/t
average power = total E/total t

SOUND

wavelength
m
frequency
Hz
time period
s
loudness
dB
intensity
W/m2
Nu = 1/T
v = λ/T
v = Nuλ
 

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