Newton's Second Law (Translational Dynamics)

AP Physics 1· difficulty 3/5

A uniform rope of mass MM hangs vertically from a ceiling. The tension in the rope at its <strong>midpoint</strong> is

  • A

    MgM g

  • B

    Mg/2M g/2

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  • C

    00

  • D

    Mg/4M g/4

Explanation

The tension at any point supports the weight <strong>below</strong> that point. Below the midpoint is mass M/2M/2, giving tension Mg/2M g/2.

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