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March 27, 2017

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A pendulum bob is released from some initial
height such that the speed of the bob at the
bottom of the swing is 1.5 m/s.
The acceleration of gravity is 9.81 m/s
2
.
What is the initial height of the bob?
Answer in units of m

  • Physics - ,

    Initial PE=final KE at bottom
    mgh=1/2 mv^2
    solve for h.

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