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Summary physics134 newtons laws
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, NEWTONS LALS eg. Split the following into 2 perpendicular componentsimme
of forces
force object
normally applies push pulling action masine
to a or on an
a
_mgcosc
force is considered an interaction between things Mgr
direction in
The which the force acts is important(vector)
and direction)
Me tugboats pull tanker, find the resultant force
eg. Two a
svir?!
Displacement 2km, 450
=
Velocity 60km.h North fx ficos45 f2x fzCos3Y
=
=
=
Force=12N, down syfisines Fy=fusise
Adding
mean
Vectors Break
*
up into components
1 >
Rx f(x fzx 40(os45 30Cos 37 52,3N
=
+
=
+
=
E
I
F, E
-
down
y y
-
R O
+ ↳
-
7
=Ry S Ry f1y fzy 40Sin4S-30sin3)=10,2N
= + =
x x
+
R3
=
R S2,3 +10,2 53,3N
=
=
>
M
E "
A
+
7
>
B -
B (pythag) resultant Hand E.:0 11
=
=
A vector
T in 7
F, +
=
5 > B INERTIAS NEWTONS FIRST LAL
A
mig first law:An object constantspeed
vectors
Newtons at rest or
moving with a
B continue to do unless acted upon
in a straight line will so by a
E, -
B i =
+ (- B):The
vector B in the resultant force.
opposite direction
and mass
uni
method Inertia of is the tendency to remain at
Memogram a
body rest or to
continue moving in
straight line with constant speed.
BEs make
a
I, y +
a
parallelogram The
mass of an object is a
quantitative measure of inertia
NEWTONS SECOND LAL-ACCELERATION
reno
i n
corporate
Newtons second law:if a resultant force acts on a mass the
Re
- Ry RSinC
= R2 Rx Ry2
= +
resulting acceleration is directly proportional to the force and inversely
Rx Rcosa
=
O ran" (s)
=
proportional to the mass. The direction of the acceleration is the same
1
as the resultant force
Ry The Gret
>
two components Rx and Rec will have ma
=
Rx
the same effect as the original vector R s i unit of force:Newton (N) 1
The =
Kg.m.s
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