Post on 18-Jan-2018
description
VectorsA vector quantity has magnitude and direction
Vector examples Scalar examplesVelocity massDisplacement lengthAcceleration volumeForce temperatureMomentum energy
Specification of direction
A
A
A
Magnitude =
E
S
W
N
60
60 N of E
30 E of N
Vectors can be moved around
A
A
Vector addition (Parallelogram Method)
AB
A+B
Draw A and B from the same point
Complete parallelogram
Join diagonal
Vector addition (Tip-to-toe method)
A
B
A+B
A
B
A
B
Place toe of B on tip of A
Join toe of A to tip of B
Reverse Vector
A-A
A+(-A)=0
Vector Subtraction
A
B
A-B=A+(-B)
-BA-B
Form -BGet A+(-B) using tip to toe
Another methodPlace B to start at same point as A
Join tip of B to tip of A
A-B