Posted by **Luricela** on Saturday, April 17, 2010 at 7:05pm.

The length of a simple pendulum is 0.72 m, the pendulum bob has a mass of 305 grams, and it is released at an angle of 10° to the vertical. a) With what frequency does it vibrate? Assume SHM. (b) What is the pendulum bob's speed when it passes through the lowest point of the swing? (c) What is the total energy stored in this oscillation, assuming no losses?

- Physics -
**drwls**, Saturday, April 17, 2010 at 10:40pm
a) f = [1/(2pi)] sqrt (g/L)

This formula should be in your text or lecture notes.

b) maximum kinetic energy = potential energy when lifted to maximum angle

= M g L (1 - cos 10)

Set that equal to (1/2)M Vmax^2. Cancel the M's and solve for Vmax

c) M g L(1-cos 10)

- Thanks -
**Luricela**, Sunday, April 18, 2010 at 10:07am
Thank You drwls :) we did get a formula for frequncy similar to the one you gave me but the one i had didnt work. Once again Thank you for your help :)

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