Neco Model Questions Vol1 2023 Physics Question 1

Practice essay / theory question 1 from the 2023 Neco Model Questions Vol1 Physics examination. This question covers Measurements and Units, Practical Skills .

Neco Model Questions Vol1 2023 Physics Essay / Theory
Topics: Measurements and Units Practical Skills
Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • essay
Neco Model Questions Vol1 2023 Physics Question 1 diagram

A simple pendulum is set up as shown in the diagram. The string is attached to a rigid stand at point A and a spherical bob hangs from the other end at point B. The length of the pendulum is measured with a metre rule and the period is measured with a digital stopwatch. The following data are obtained:

Question Parts

( a )
Three independent measurements of the length AB are recorded as 0.980 m, 0.985 m and 0.982 m. Determine the best estimate of the length and its absolute uncertainty (express the result in the form L ± ΔL).
( b )
The time for 20 complete oscillations is measured three times giving 40.2 s, 40.5 s and 40.3 s. Calculate the experimental period of the pendulum (T) and its absolute uncertainty, expressing the result as T ± ΔT.
( c )
Using g = 9.8 m s⁻², calculate the theoretical period of the pendulum from the length obtained in part (a). State the formula used and give the numerical value to two decimal places.
( d )
Determine the percentage error between the experimental period (part b) and the theoretical period (part c). Also discuss at least two possible sources of error that could affect the experimental result.

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About This Question

This is Neco Model Questions Vol1 2023 Physics Question 1. It is one of the essay questions from the 2023 Neco Model Questions Vol1 Physics examination.

The question covers Measurements and Units, Practical Skills .

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