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Posted by on Saturday, October 20, 2012 at 2:54pm.

Consider a swimmer who wants to swim directly across a river. If the speed of the current is 0.31 m/s and the swimmer's speed relative to the water is 0.57 m/s, how long will it take her to cross a river that is 13 m wide?

  • Physics - , Tuesday, May 14, 2013 at 12:28pm

    If

    vave = (change of displacement)/(time elapsed)

    then,

    t = (change of displacement)/(average velocity)

    SO,

    t = (13 meters)/(0.57 m/s) = 22.8 s

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