Friday 04-09-2015 Centre of Mass Classwork We recapped on ideas about pendulums, and also the relationship between period and frequency. We considered the best way to time a the swing of a pendulum. We did a practical to find the centre of mass of a cardboard shape. We chucked a piece of caradboard so it span and used a slow motion camera to analyse the motion. Homework Answer Q1 on P51 and Q1-2 on P53. Hand in on Monday morning before registration. Thursday 03-09-2015 The Pendulum Classwork We investigated the effect of the length and the mass on the period of a pendulum. Homework Read and make notes on Centre of Mass on P50-51. Bring these notes to next lesson. Watch this video which shows an experiment you will do next lesson. No need to make notes on this.