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A woman is sitting in a boat at anchor on a lake. Her boat bobs up and down once every 2.0·s. She notices that when the front of her 3.0·m long boat is at one wave crest, a second crest is at the middle of her boat, and a third is at the end.

What is the frequency of the waves? ____ Hz.

What is their wavelength? _____ m.

What is their speed? _____

Can someone explain how to get these?

  • physics -

    You told me the period was 2 s so the frequency is (1/2) Hz

    Two complete wavelengths along 3 meter boat
    so Lambda = 3/2 = 1.5 meters

    speed = distance/time = 1.5/2 = .75 m/s

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