A boat travels directly across a river that has a downstream current, v.

What is true about the perpendicular components of the boat’s

velocity?

a. One component equals v; the other component equals zero.

b. One component is perpendicular to v; the other component equals v.

c. One component is perpendicular to v; the other component equals v.

d. One component is perpendicular to v; the other component equals

zero.

(answer is C but explain why)

BLANK Jul 21, 2019

#1**+2 **

The boat travels directly across the river at a velocity......this component of its 'final' or resultant velocity is perpindicular to 'v' .

the boat ALSO travels downriver at velocity 'v' ....this component is perpindicular to its crossing velocity, but it is a component of its resultant velocity.

Another way:

The boat has two perpindicular components of its 'resultant' velocity..... the downriver current, v , and its crossing velocity (provided by its motor...or sail...or paddle etc).

Guest Jul 21, 2019