(II) Determine the speed of the boat with respect to theshore in Example 3–10. EXAMPLE 3-10 Heading upstream. A boat's speed in still water is vgw =1.85 m/s. If the boat is to travel north directly across a river whose westward current hasspeed vws = 1.20 m/s, at what upstream angle must the boat head? (See Fig. 3–29.)APPROACH If the boat heads straight across the river, the current will dragthe boat downstream (westward). To overcome the river's current, the boatmust have an upstream (eastward) component of velocity as well as a cross-stream(northward) component. Figure 3–29 has been drawn with vgs, the velocity ofthe Boat relative to the Shore, pointing directly across the river because this iswhere the boat is supposed to go. (Note that ves = ¥gw + Vws.)SOLUTION Vector vgw points upstream at angle 0 as shown. From the diagram,Vws1.20 m/ssin 0 =0.6486.VBW1.85 m/sThus 0 = 40.4°, so the boat must head upstream at a 40.4° angle.

Name: (II) Determine the speed of the boat with respect to theshore in Examp
Uploaded: 2024-03-05T11:56:34.000Z
Channel: Bartleby
Description: (II) Determine the speed of the boat with respect to theshore in Example 3–10. EXAMPLE 3-10 Heading upstream. A boat's speed in still water is vgw =1.85 m/s. If the boat is to travel north directly across a river whose westward current hasspeed vws =