In this experiment, you will investigate the oscillations of a pendulum. You may not need to use all of the materials provided. (a) ● Assemble the apparatus as shown in Fig. 1.1 with the nail held securely in the cork. Check that the wooden rod can swing freely. ● You have been provided with one 50g and four 10g slotted masses. Use the bolt and nut to attach some of the 10g slotted masses to the top hole. ● Record the total mass $M$ of the slotted masses that are attached to…

Physics 9702/34 — May/June 2023

Cambridge AS Level · Advanced Practical Skills · worked solutions for every part, with the mark scheme

questions

marks

120

minutes

Topics Manipulation, Measurement and Observation · Presentation of Data and Observations · Analysis, Conclusions and Evaluation

Q1Manipulation, Measurement and ObservationPresentation of Data and ObservationsAnalysis, Conclusions and EvaluationFree sample

In this experiment, you will investigate the oscillations of a pendulum.

You may not need to use all of the materials provided.

(a)

● Assemble the apparatus as shown in Fig. 1.1 with the nail held securely in the cork.
Check that the wooden rod can swing freely.

Fig. 1.1

● You have been provided with one 50g and four 10g slotted masses. Use the bolt and nut to attach some of the 10g slotted masses to the top hole.
● Record the total mass $M$ of the slotted masses that are attached to the top hole.

$M$ = ______

● Push the bottom of the wooden rod a small distance to one side.
● Release the wooden rod so that it oscillates.
● Take measurements to determine the period $T$ of the oscillations.

$T$ = ______

(b)

Change $M$ and determine $T$ . Repeat until you have six sets of values of $M$ and $T$ . Do not change the lower mass.

Record your results in a table. Include values of $M^2$ and $T^2$ in your table.

(c)

(i)

Plot a graph of $T^2$ on the $y$ -axis against $M^2$ on the $x$ -axis.

(ii)

Draw the straight line of best fit.

(iii)

Determine the gradient and $y$ -intercept of this line.

gradient = ______
$y$ -intercept = ______

(d)

It is suggested that the quantities $T$ and $M$ are related by the equation

T^2 = aM^2 + b

where $a$ and $b$ are constants.

Using your answers in (c)(iii), determine the values of $a$ and $b$ . Give appropriate units.

$a$ = ______
$b$ = ______

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