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Lecture

PHYS 1114 Lecture Notes - Net Force

by

Department
Physics
Course Code
PHYS 1114
Professor
B.Hughes

This preview shows half of the first page. to view the full 2 pages of the document. Vectors
Vectors (in forces) are quantities that have both a magnitude and a direction.
ex. tension gravity normal force friction
street direction velocity acceleration forces
displacement
Scalars are quantities that have no direction
ex. temperature mass distance energy number of people in room
Ways to write directions with forces is by direction itself or by angle
ex. F(with vector on top )g=100N [down]
T(with vector on top)=20N[60o] <counter-clockwise from the positive x-axis
Inertia
Inertia is the tendency for any object to resist any change in its motion (measured
in mass)
The law of Inertia aka Newton's First Law
An object persists in its state of rest or of moving uniformly straight forward until a
new force compels it to change its state of motion
uniform motion= constant speed {includes a speed of zero} in a straight line
To record and analyse motion: location time velocity &
acceleration
To record and analyse motion we need: a number line timer
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