Physics Investigation: determine the periodic time of an oscillating body For example, a simple pendulum Report headings Indicative content AO Title Investigation of the relationship between period and length for a Teacher simple pendulum led Objective To find the periodic time of an oscillating body Teacher led Introduction Definitions of oscillatory motion and periodic time A01 Materials and Pendulum bob, thread, split cork, retort stand, timer, metre rule A01, Apparatus with labelled diagram of set up A02 Risk assessment Identification of risks and explanation of how to minimise risk, for A03 example: . risk of injury from pendulum movement Procedure Use different lengths of thread. For each length of thread: A02. set the pendulum in motion: small oscillations A03 time a set number of pendulum oscillations repeat and calculate and average value for T repeat procedure for different lengths of thread Results Table of results with appropriate headings and units A02 Graph of periodic time against length of pendulum Graph of T' against length of pendulum Use the graph of T' against length to calculate T Conclusion T- proportional to length of pendulum A03 Evaluation, limitations and sources of error in the experiment should be given