A 15 A student walks 8.0 km south-east and then
12 km due west.
Draw a vector diagram showing the route. Use
your diagram to find the total displacement.
Remember to give the scale on your diagram
and to give the direction as well as the
magnitude of your answer.
b Calculate the resultant displacement. Show
your working clearly.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.