Summery of the VPM section of physical sciences taught in the grade 12 CAPS (NSC) syllabus. Includes diagrams, notes, definitions and extra information related to popular questions.
Graphs:
𝛥𝑦
• Gradient =
𝛥𝑥
• Area = between graph line and x-axis.
• Direction changed = reflect about the x-axis.
• +/- refers to direction and number refers to magnitude.
Extra information:
• Acceleration occurs in the direction of Fnet.
• Velocity occurs in the direction of motion.
• Falling object: Fnet gets smaller, v gets bigger, Ff gets bigger, w remains constant.
• At the same height above the ground, 𝑣𝑡ℎ𝑟𝑜𝑤𝑖𝑛𝑔 > 𝑣𝑑𝑟𝑜𝑝𝑝𝑖𝑛𝑔 .
VPM consists of 5 types of motion (discussed below):
Hints for the section:
• Redraw simpler diagrams.
• Write values for a, y, vi, vf and t next to
the diagram or on your page before
starting with calculations.
• Choose initial direction as positive
direction.
Kimberly Fourie • Gravitational acceleration is a known
value and always points down.
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