7. Representing vectors
Vectors can be represented by arrows. The
length of the arrow indicates the magnitude,
and the direction the direction!
8. Representing velocity
Velocity can also be represented by an
arrow. The size of the arrow indicates the
magnitude of the velocity, and direction the
direction!
When discussing velocity or answering a
question, you must always mention the
direction of the velocity (otherwise you are
just giving the speed).
9. Adding vectors
When adding vectors (such as force or
velocity) , it is important to remember they
are vectors and their direction needs to be
taken into account.
The result of adding two vectors is called
the resultant.
22. An interesting example
velocity
In uniform circular motion, we have
constant speed but changing velocity.
Of course a changing
velocity means it must
be accelerating! We’ll
come back to this next
year!