February 23, 2017

Homework Help: Physics

Posted by Jennifer on Wednesday, October 20, 2010 at 2:38pm.

A motorboat is traveling 5m/s East, and encounters a current traveling 2.5m/s, North. If the witdth of the river is 80m wide, how much time does it take the boat to reach the other shore. I understand how to calculate the resulatant velocity, but I don't understand why you use the velocity 5 m/s to calculate the time and not the resultant velocity, 5.59m/s to calculate the time.

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