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A 20 g mass is attached to a 120 cm long string. The tension in the string is measured to be .200N. What is the angle.

l \
l \
l \
l o

Sorry crappy picture, but the circle is the mass and the diagonal lines represent the string the mass is attached to.

  • Physics -

    I assume the mass is not moving (yes, that matters, centripetal force).

    the mass has a downward force of mg,

    so CosTheta= mg/.2N

  • Physics -

    It's wrong!!!

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