x Turn on thread page Beta
 You are Here: Home >< Physics

# Oscillations question watch

1. Alil help on this please?
2. The question is referring indirectly to "beat" frequency.
Have you heard of this, and do you know how to calculate it from two given, slightly different frequencies?

It can also be worked out using a bit of common sense by considering that each time the 1.9s pendulum comes back the other one is 0.1s further behind it.
How many times must it come back before the slower pendulum is one whole oscillation behind?
3. 38s.

The 1.9 second pendulum has a time period of 0.1 seconds faster than the 2.0 second pendulum. Therefore, after 20 swings of it, it will have taken the same amount of time to do so as the 2.0 second pendulum to do 19 swings. 1.9*20 =38, 2.0*1.9 = 38
4. (Original post by OliverG)
...
We understand you want to help, but the forum guidelines ask that you do not post a complete solution to numerical problems.

The idea is to help the poster do it her self, and not do it for her..

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 22, 2014
Today on TSR

### Boyfriend slept with someone else

...we were on a break

### Mum says she'll curse me if I don't go to uni

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE