Air Ambulances allow patients to be transported very quickly to hospital. The
helicopter pilots must take into account wind velocity when planning their
journey.
Charts show
wind speed in
m/s and an
arrow shows
the direction.

The normal cruising speed of the helicopter is 70m/s (250km/h).
Use the information to answer the following questions.
1. The Exeter Air Ambulance is sent due west to a point near Okehampton.
(a) What is the resultant velocity on the journey to Okehampton?
_________________ m/s
(b) What is the resultant velocity on the journey back to Exeter?
_________________ m/s
2. The pilot of the North Devon Air Ambulance sets the helicopter controls
to fly due North. Use calculations or a vector diagram to confirm that the
helicopter will reach a patient in Lynton.
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3. Explain the difference between a scalar (such as speed) and a vector
(such as velocity).
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