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Grade 12 IEB Physical Science (Physics) Gravitational and Electric fields (Section D) summary & notes

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This aesthetic, in-depth, neatly typed document summarises Section D of the IEB Grade 12 Physics syllabus: Gravitational and Electric fields. This document includes the full Section D syllabus, all definitions, additional class notes, own research notes and all relevant diagrams.

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Gravitational & Electric Fields:
Gravitational Fields:
2 objects:




Force of attraction (Fg) between them depends on:

• Fg directly prop. to m1

• Fg directly prop. to m2

• Fg directly prop. to m1.m2
Straight line through origin
(directly proportional)


• Big distance = small Fg

• Small distance = big Fg


1
• Fg directly proportional to
r2
• Fg inversely proportional to the square of the
distance between the masses



G:m1:m2
Fg =
r2
• m: Mass (kg)

• r: distance (metres)

• G: Universal Gravitational constant: 6; 7 £ 10¡11 N :m2 :kg ¡2

• F directly prop. to m1:m2
r2

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