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March 28, 2017

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A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45ยบ below the horizontal and is given an initial downward speed of 1.50 m/s.

find:

At the bottom of the arc, determine the centripetal acceleration of the bob.

At the bottom of the arc, determine the tension in the string.

  • Physics - ,

    the KE at the bottom equals the initial PE (mgh) 0f the bob.

    1/2 mv^2=mg(1.70cos45)
    solve for v. then V^2/r


    tension= mg+mv^2/r

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