Define speed and velocity and use these definitions to explain why one of these quantities is a scalar and the other is a vector.
The following list contains scalar and vector quantities. Underline all the scalar quantities.
acceleration
force
mass
power
temperature
weight
A boat is travelling in a flowing river. The figure below shows the velocity vectors for the boat and the
river water.
The velocity of the boat in still water is 
to the east. The velocity of the water is 
from 
north of east.
On the figure, draw an arrow to show the direction of the resultant velocity of the boat.
Determine the magnitude of the resultant velocity of the boat.
of the boat
.
