Period of a Pendulum

1. Apr 17, 2013

CivilSigma

1. The problem statement, all variables and given/known data
Pendulum A is 20 cm long and has a 5g mass on it. Pendulum B is 30 cm long and has 10g mass on it. Which one has a faster period?

2. Relevant equations

d=v1t+0.5at^2

3. The attempt at a solution

First of all, does the mass of the pendulum matter at all? and if not then it I would need to find the time in both cases and divide by 1 right?

Time Pendulum A= 0.20 s which means that the period is 0.20 s.
Time Pendulum B= 0.25 s which means that the period is o.25 s.

Am I right? Thank you in advance.

2. Apr 17, 2013

rude man

Nope.
???

Whence these numbers?

Am I right? Thank you in advance.[/QUOTE]

No.
What's the formula for the period of a simple pendulum?

3. Apr 17, 2013

CivilSigma

I do not know because we have not learned it. >.<

4. Apr 17, 2013

rude man

Then you'll have to derive it from the differential equation relating restoring torque to angular acceleration for small deviational angles.

Really it would be simpler for you to just look it up though.