How can a boat navigate pass the canal without knocking onto the sides?
Knock!!
Knock!!Knock!!
Knock!!
Scalars and Vectors
Objectives: state what is meant by scalar and vector
quantities and give common examples of each
add two vectors to determine a resultant by a graphical method
solve problems for a static point mass under the action of 3 forces for 2-dimensional cases (a graphical method would suffice)
Scalars and Vectors
Vector quantities have magnitude and direction.
Scalar quantities only have magnitude.
Vectors Scalars
Weight Mass
Velocity Speed
Displacement Distance
Scalars and Vectors
Adding Vectors to find Resultant Vectors (One Dimension):
Car travels 3m right and 1m left
3m
1m2m
0.5m
Scalars and Vectors
Adding Vectors to find Resultant Vectors (Two Dimension):
Rocket travelling up at 3ms-1 and right at 4ms-
1
3ms-1
4ms-1
5ms-1
1ms-1
Scalars and Vectors
Example (Parallelogram Rule)Find the resultant force of the two forces given below.
3N
2N
objectVectors must
retain direction and magnitude
1N
Scalars and Vectors
ExampleIn which direction should a force be added to the diagram below so that the object will not move.
1N
1N
1N
1N
1.41N
0.5N
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