Summary
Summary Momentum & Impulse
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Summary of IEB Physical Sciences Momentum and Impulse sections.
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MOMENTUM + IMPULSEMOMENTUM:
Linear product of of
momentum (p) is the the mass and
velocity an
object
P= o v
direction
unit:
kg.m.5" +
CHANGE IN MOMENTUM:
momentum(up) final
change in is the difference between the and the initial momentum of the
object
Op=mv-mu
unit:
kgm.s" direction
IMPULSE:
Impulse (J) is the product of the net force and contact time
J =
Fret Ot OR 5 =
Up: mv-my
Unit: N.S"+ direction unit:
kg.m.s"+ direction
NEWTON'S SECOND LAW IN MOMENTUM FORM:
The net force to the of of momentum
acting on a n
object is
equal rate
change
Fret Ot =
mv-mu
LAW OF CONSERVATION OF LINEAR MOMENTUM:
The total linear momentum of an isolated remains constant
system
ELASTIC vs INELASTIC COLLISIONS:
elastic collision collision where both momentum kinetic conserved
is
energy
a and are
inelastic collision is conserved
a collision where
only momentum is
TIPS TO CALC:
·P/cp/31F It is asked
-
choose direction as +
-
write it down
-calc. w) equations
-
direction!!
-
Fret: Watt -
not isolated
system
in
bullets guns
p is conserved mass changed
·
-
-
falling on/off trolley
-
choose direction
as +, write down
Spring btwn blocks released
-
FOLLOW FORMAT:
Before collision: After collision:
bullet in
gun,
S miE (
M, = m, I missile in cannon
bomb exploding
2, =
VI
=
released
#
=
Mz= me Still before collision
:4 = 8
42 NB-signs!!
= =
vz Uz = 0
Sip before =
Sp after
MM, U, +Mecle M.U,
=
toeVz cr, + 2 V)
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