© Department of Physics, University of Guelph.
Select the problem number or part you wish.
1. A motor boat can run at 10.0 m s-1
in still water.
2. You are drifting north in a balloon at
20 km/hr. A bird flies past you and to you it is travelling at 15 km/hr
due east. What bird velocity would an observer on the ground see?
3. These problems will not always have the two vectors at right angles.
Try this one:
(a) In what direction must the motor boat be pointed to directly cross
a river flowing at 3.00 m s-1?
(b) What is the velocity of the motor boat directly across?
City B lies 500 km from city A in a direction 30.0º east of north.
An airplane is required to travel from A to B in 2.00 hr.
(a) If no wind is blowing, in what direction
and with what speed must the airplane fly?
(b) A wind is blowing from a direction
120º west of north with a speed 60.0 km hr-1. With what
speed and in what direction must the airplane fly?
(Hint: a good diagram is essential. Which velocity vector is the resultant
vector?)