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Summary Newtons Laws of Motion and Friction
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Handwritten cheat sheet for Newtons Laws of Motion and Friction by JEE 2020, GATE, CSIR topper.
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Newton's laws of MohonIN 10 dyne
Jrextia i- Resistance of an object to change ik state
of motion Cdirechion, speed, regt)
Ineria d masg
P-ma
acceleraton has te same diechon ag foe
"Every achon has equal and opp. reacthon e on
twodiff bodieg
JAchon &teachon don't cancel each other as hey ac
lon
tuodit.d bdies
All contact forces ane
olectromagnetic in nature
E- Gm,m, Gs 6-67XI6 CUniversal grutahonal
constant )
|Fzm Calsoknoon ag
oaighd of he objet)
Noxmali The componernt of conact fore along he
noSTIal. dis alays L toa suface
Tension Intexnal paling CTensile) xe
E he saing s masaless hen kaion
tesion traughout he
shting is såme
, Spring foroe i- Whern
Fzkx F:-kl
|ahera k is spring constarnt & x is re clvgad or
comprasSd dslahee bom mean position
Equlbrium of paxticles
net net
The object could be at rest or in unilbrm hnear mation
Dgnamics
N=ngcosQ
gsin
mg
a-gsinq
FzmzsinQ
Cuhen suoface is smocth)
Non-ehertial frame i- Ans frame of. referenee which
is accelerating wrt Saxth
To corect te calculatto n, we must include an eha
foxeSuch a torce is kno wn as pseudo forie
lor fictitous foace
pseudo fosce - ma.
t hs diechon is oPp. to hat of he observer
dt
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