Question 37 – Practical skills assessed in a written examination - Questions

An experiment is set up to investigate Hooke's Law using a helical steel spring suspended from a rigid support. A student measures the length of the spring before and after suspending a heavy mass from its lower end.

The length of the spring is measured using a standard metre ruler:

The initial length is recorded as $cm15.5\text{ cm}$ .
The final length is recorded as $cm23.5\text{ cm}$ .
The metre ruler used is accurate to the nearest $cm0.1\text{ cm}$ (giving an uncertainty of $cm\pm0.1\text{ cm}$ for each individual reading).

Calculate the percentage uncertainty of the measured extension of the spring. Give your answer to an appropriate number of significant figures.

The length of the spring is measured using a standard metre ruler:

The initial length is recorded as $cm15.5\text{ cm}$ .
The final length is recorded as $cm23.5\text{ cm}$ .
The metre ruler used is accurate to the nearest $cm0.1\text{ cm}$ (giving an uncertainty of $cm\pm0.1\text{ cm}$ for each individual reading).

Calculate the percentage uncertainty of the measured extension of the spring. Give your answer to an appropriate number of significant figures.

Practical skills assessed in a written examination

Question 29

Practical skills assessed in a written examination

Question 29

Practical skills assessed in a written examination

Question 29

Practical skills assessed in a written examination Questions

Practical skills assessed in a written examination

Question 29

Practical skills assessed in a written examination Questions