These notes cover Section D as per the IEB Physical Sciences SAGS. Included are comprehensive and annotated examples notes on Gravitational Fields, Electrostatics and Electric Fields. Although these notes are detailed, to perform well in physics, practicing textbook examples as well as past papers ...
Test Bank For Physical Science, 13th Edition All Chapters - 9781264129362
Test Bank For Physical Science, 13th Edition All Chapters - 9781264129362
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GRAVITATIONAL AND
ELECTRIC FIELDS
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, D) GRAVITATIONAL AND ELECTRIC FIELDS
1. GRAVITATIONAL FIELDS
NEWTON’S LAW OF UNIVERSAL GRAVITATION
Every particle with mass in the universe attracts every other particle with a force which is
directly proportional to the product of their masses and inversely proportional to the
square of the distance between their centres
𝒎𝟏 𝒎𝟐
𝑭=𝑮
𝒓𝟐
F: force of gravitational attraction (N)
G: gravitational constant = 6,7 × 10−11
m1: mass of object 1
m2: mass of object 2
r: distance between their centres
WEIGHT (Fg)
The gravitational force that the earth exerts on any object on or near its surface
W/Fg: gravitational force
(N)
m: mass of the object (kg)
g: gravitational
acceleration = 9,8m. s −2
• Weight is a force measured in Newtons
• It is determined by gravity
• The magnitude of weight depends on where the object is in the solar system
FORCE FIELDS
A region of space in which an object will experience a force
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