WPH13Topic 3.22 questions
Planning an experiment: apparatus, measurement technique, control variables, safety and sources of error.
Plan an experiment and identify the apparatus required
Describe how to measure relevant variables using the most appropriate instrument and correct measuring techniques
Identify and state how to control all other relevant variables to make it a fair test
Discuss whether repeat readings are appropriate
Identify health and safety issues and discuss how these may be dealt with
Discuss how the data collected will be used
Identify possible sources of uncertainty and/or systematic error and explain how these may be reduced or eliminated
Comment on how the experiment may be improved, possibly by using additional apparatus (e.g. to reduce errors)
Comment on the implications of physics (e.g. benefits/risks) and on its context (e.g. social/environmental/historical)
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Original practice questions written in the style of the exam.
A student plans to determine the acceleration of free fall, , by dropping a steel ball from rest through different heights and timing the fall with an electronic timer triggered by light gates.
Describe how the student should carry out and analyse the experiment to obtain an accurate value of .