# Simple Harmonic Motion - Period (T)

1. Nov 28, 2007

### ahero4eternity

[SOLVED] Simple Harmonic Motion - Period (T)

1. A pendulum oscillates with a period T.

If both the mass of the bob and the length of the pendulum are doubled, the new period will be _____.

2. T = 2(pi) x rad (k/m)

3. Since L is not a part of the equation, it shouldn't affect the period - right? If that's true, then shouldn't the new period be: T/rad (2) ?

Sorry, I don't know how to insert symbols (i.e. pi and rad).

2. Nov 28, 2007

### Kurdt

Staff Emeritus
That equation is for the time period of a spring. The equation for a pendulum is:

$$T = 2\pi \sqrt{\frac{L}{g}}$$

3. Nov 28, 2007

### ahero4eternity

Thanks. I just figured that out after 5 mins of Googling. My professor hasn't gone over that yet. I guess that is what Friday's lecture is about...since this HW isn't due unti Sunday. Thanks again!