- #1

gungo

- 27

- 1

## Homework Statement

A swimmer jumps into a 5.1 km river and swims straight to the other side at 0.87 km/h [N].

There is a current in the river of 2.0 km/h [W]

a)How long does it take the swimmer to reach the other side?

b)How far downstream has the current moved her by the time she reaches the other side?

## Homework Equations

v= d/t

a^2+b^2=c^2

## The Attempt at a Solution

a) I got the correct answer but I don't understand why the 0.87 km/h [N] was used instead of the 2.0 km[W]

t=d/v

t=5.1/0.87

t=5.9 hrs

b) total velocity= √0.87^2+2^2

=2.18

I'm really not sure what I'm trying to look for??