IEB Grade 12 Vectors, graphs of motion, different forces notes
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Course
Physical Sciences
Institution
12th Grade
This document contains notes on vectors, graphs of motion and different forces from the IEB SAGS. These notes have simplified explanations as well as all the IEB SAGS definitions.
and direction
>
physical quantity which has magnitude (size )
>
eg position displacement velocity
,
,
,
acceleration
> direction
tail
1 magnitude
them
original
>
as the
resultant vector is a
single vector which has the same effect vectors
acting together
scalars
>
physical quantity which has magnitude only
>
eg distance , speed ,
mass
,
time
Position (X )
> reference point is where we measure the position of an object
> use positive (t ) and negative C- 1 signs to denote direction
Distance
>
length of path travelled ( scalar )
0°
Direction
270° -90°
stated as
bearing
>
1800
Displacement
>
change in
position of a body ( vector )
Atl g 40M
•
B
30M¥
displacement at C
* " "° " "
"
30M 50m at 126,87°
I =
tan -11%8-1=36,870
D•
•
40M C
, distance
speed average speed
=
time
rate of of distance ( scalar )
change
>
velocity average velocity
=
di%¥m%M ( constant velocity )
> rate of change of displacement ( vector )
>
instantaneous velocity is the
velocity at a
particular instant in time
change in velocity
Acceleration acceleration =
time
rate in
>
change of velocity
*
projectiles take the same time to reach their
greatest height from the point of
upward launch as
they take to fall back to the
point of launch
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