Fluids and Conservation Laws (Continuity, Bernoulli)

AP Physics 1· difficulty 4/5

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Water exits a small hole at depth h=5.0h = 5.0 m below the open surface of a large tank. Using Bernoulli (Torricelli), what is the exit speed?

  • A

    5.05.0 m/s

  • B

    4949 m/s

  • C

    9.99.9 m/s

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  • D

    2.22.2 m/s

Explanation

v=2gh=2(9.8)(5.0)=9.9v = \sqrt{2gh} = \sqrt{2(9.8)(5.0)} = 9.9 m/s.

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