These notes cover all of the physical science topics for the IEB and NSC matric syllabus. They are eye-catching and easy to comprehend, to make your learning experience much more enjoyable. The notes are made digitally and are printable. This document does not include the chemistry section of the ...
,Vectors
Terminology:
Vector Physical quantity with both magnitude
and direction.
Scalar Physical quantity with magnitude only.
Resultant vector Single vector which has the same
effect as the original vectors acting
together.
Determining the resultant vector:
Vectors in 2 dimensions:
Parallelogram method
(Scan qr code to watch explanation
video)
When to use
Resultant vector
Pythagoras method 1. Chose whether up & down is
positive /negative. And chose
wheter left & right is
positive/negative.
2. Determine vertical comonents
using, 𝐹𝑦 = 𝐹𝑎 𝑆𝑖𝑛𝜃.
, 3. Add component in same plane
(add the ones going up & then
add the ones going down)
4. Determine Fnet of vertical
components using vector addition.
5. Repeat steps 2-4 but for
horizontal components
(left/right) using, 𝐹𝑥 = 𝐹𝑎 𝐶𝑜𝑠𝜃.
6. Draw:
In this case the Fnet of
𝐹𝑦 the vertical component
was up & the horizonal
𝛽
𝐹𝑥 was to the right.
7. Use phythagoras to determine
the resultant force.
8. Use trigonometry to determine
𝛽.
9. Subtarct 𝛽 from 180° and the
answer will be the bearing from
horizontal.
10. Leave answer in Newtons &
bearing as direction.
When to use
, Objects on a slope:
• 2 components
o Perpendicular component (normal force)
o Parallel component
Perpendicular 𝐹𝑁 = 𝐹𝑔 = 𝑚𝑔𝐶𝑂𝑆𝜃
𝑝𝑒𝑟
Parallel 𝐹𝐴 = 𝐹𝑔 = 𝑚𝑔𝑆𝑖𝑛𝜃
𝑝𝑎𝑟
𝐹𝑁
𝐹𝑔
𝑝𝑎𝑟𝑎𝑙𝑙𝑒𝑙 𝐹𝑔
𝑝𝑒𝑟𝑝𝑒𝑛𝑑𝑖𝑐𝑢𝑙𝑎𝑟
𝜃
𝐹𝑔
Displacement, velocity & acceleration
Scalars
Distance Length of path travelled.
Speed Rate of change in distance.
Vectors
Displacement Change in position.
Velocity Rate of change in position.
Acceleration Rate of change in velocity.
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