Homework Help: Physics

Posted by Luis on Saturday, June 25, 2011 at 8:58pm.

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 45º 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 - bobpursley, Saturday, June 25, 2011 at 9:26pm
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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