This note is an AQA A level Physics note on Force, Energy and Momentum, There are useful tables, graphs and so drawings in the note for better understanding.
or with line underneath letter
30N to the north-east
ex) U 1
-in
or
, 2 .
Adding Vectors
·
Adding forces (N)
gravitational field strength
W =
my -
=
9 .
81Nkg"/about lONkg-1
-
Adding vectors gives rise to
In resultant vector
equivalent
-
Depending on the direction of the vectors ,
the value can change
um
Ex) 600N + 85ON =
1450N
↓ =>
same direction
addition
W
W
Ex) 600N I 850N -
250N
opp . direction
↑ >
↑
subtraction
~
·
Adding Vectors not at 90° angles
If vectors
-
at
angles to each other ,
use
trigonometry or
Resultant
scale
drawing
Force
-met -
resultant force can be found
by measuring the length of resultant force
& with the
600N ⑧
850N measuring the angle it makes
30
vertical or horizontal
7
-
Tigonometry can also be used
* arrow-head of one of the
vectors must be joined to the
start of the other vector &
, . Adding perpendicular
vectors
be used add vectors
-
Pythagoras can to
perpendicular
M
7
& draw diagram wI the arrow-head
of one vector touching the fail of next
A lOms-1
-
B toms-1 A +
B
resultant
B 20ms1
2
using Pythagoras ,
magnitude of Resultant A +
B 20 -
- 202 =
22 .
4ms- A lOms-1
& To define vector
completely tano
=
,
2
also need K of resultant
:
0 arctan (2) 63 4
=
=
(4 made with horizontal/vertical) .
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