Ijmb Model Questions Vol1 2017 Physics Question 1

Practice practical question 1 from the 2017 Ijmb Model Questions Vol1 Physics examination. This question covers Measurements and Units, Error analysis .

Ijmb Model Questions Vol1 2017 Physics Practical
Topics: Measurements and Units Error analysis
Question 1 IJMB_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • practical

A simple pendulum is to be used to determine the acceleration due to gravity (g). The pendulum consists of a thin light string attached to a small spherical bob. The length of the pendulum is measured from the point of suspension to the centre of the bob.

Question Parts

( a )
Describe a procedure for obtaining the period of the pendulum with a stopwatch, ensuring that the angular displacement is small (≤5°). State at least three precautions that improve the reliability of the measurement.
( b )
The length of the pendulum is measured as 0.980 m with an uncertainty of ±0.002 m. Ten successive measurements of the time for 20 complete oscillations give the following total times (s): 40.12, 40.15, 40.10, 40.18, 40.13, 40.11, 40.14, 40.16, 40.09, 40.17. Using these data:
( ) Calculate the mean period of one oscillation and its standard deviation.
( ) Determine the value of g and its percentage uncertainty, assuming the uncertainty in length dominates.
( c )
List two possible sources of systematic error in this experiment and suggest a method to minimise each.

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About This Question

This is Ijmb Model Questions Vol1 2017 Physics Question 1. It is one of the practical questions from the 2017 Ijmb Model Questions Vol1 Physics examination.

The question covers Measurements and Units, Error analysis .

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