Swimming at 0.15 m/s relative to still water, a swimmer heads directly across a 100-m-wide river. He arrives 50 m downstream from a point directly across the river from his starting point.(adsbygoogle = window.adsbygoogle || []).push({});

a) What is the speed of the current in the river?

b) In what direction should the swimmer head so as to arrive at a point directly opposite his starting point?

I got 13.3 meters/second for part (a). Can someone check this?

For part (b), I am unsure of what to do. Can someone give me a hint in the right direction?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Velocity and displacement question

**Physics Forums | Science Articles, Homework Help, Discussion**