A student uses a stopwatch to measure the time taken for a pendulum to complete one swing.
The display on the stopwatch after the pendulum completes 10 swings is shown on the diagram.
For this reading, determine:
[1]
Calculate the mean time for one complete swing with its absolute uncertainty and a percentage uncertainty.
Give your answer to an appropriate number of significant figures.
Draw lines between the three types of error to show if the error affects the precision or accuracy of a result.
In order to reduce errors, a different student collected measurements of time over 20 cycles instead of 10.
Complete the following sentences by circling the correct word and placing a tick (✓) next to the correct explanation
Repeated measurements reduce systematic / random errors because...
using a larger sample to calculate the mean value reduces the uncertainty in the final value | |
these cause values to be different by the same amount each time, hence they are not influenced by repetition |
Repeated measurements have no effect on systematic / random errors because...
using a larger sample to calculate the mean value reduces the uncertainty in the final value | |
these cause values to be different by the same amount each time, hence they are not influenced by repetition |
Did this page help you?