Edexcel A-Level Physics A2 6.3.3 Measuring Variables Questions

Review measuring variables in Edexcel A-Level Physics through timing techniques, ruler alignment, caliper measurements and data-logger choices.

Exam points

describe accurate timing methods using markers, multiple oscillations, repeats and small displacements
measure lengths or heights using rulers, set squares, perpendicular viewing and calipers
choose data loggers when readings change quickly or repeated measurements are needed

[Maximum number: 2]

A student added small lead spheres to a test tube. The student placed the test tube in a small beaker of water. The test tube floated as shown.

The student gave the test tube a small vertical displacement. The test tube then oscillated vertically.

The student measured the time period T of the oscillations using a stopwatch. She repeated the measurement of T and calculated a mean.

Describe two other techniques she should use to determine T.

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