1. 2D Relative Motion Problem #1
A boat, whose speed in still water is 1.70 m/s, must cross a 260m –wide river and arrive at a point 110m upstream from where it starts. To do so, the pilot must head the boat at a 450 upstream angle. What is the speed of the river’s current?
X (m/s)
Y (m/s)
VBW
1.7sin45
1.7cos45
VWG
VBG
Vsin23
Vcos23

2. 2D Relative Motion Problem #1
X (m/s)
Y (m/s)
VBW
1.7sin45
1.7cos45
VWG
VBG
Vsin23
Vcos23

3. Problem #2
An airplane whose air speed is 620 km/h is supposed to fly in a straight path north of east. But a steady 95 km/h wind is blowing from the north. In what direction should the plane head?
620km/h
95km/h
350

4. Problem #2
An airplane whose air speed is 620 km/h is supposed to fly in a straight path north of east. But a steady 95 km/h wind is blowing from the north. In what direction should the plane head? 35 θ
The plane’s heading should be north of east.