Physics 9702/34 — October/November 2017

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 motion of a pendulum.

(a)

Assemble the apparatus as shown in Fig. 1.1 with the total mass $m$ of the mass hanger and mass equal to $150\text{ g}$ .

The distance between the bottom of the split cork and the bottom of the mass hanger should be $64\text{ cm}$ . It may be necessary for the mass to hang over the edge of the bench.

Fig. 1.1

(b)

(i)

Move the mass a short distance to one side and then carefully release it so that it swings with as little bouncing as possible, as shown in Fig. 1.2.

Fig. 1.2

(ii)

Take measurements to determine the period $T$ of the pendulum.

$T$ = ______

(c)

Change $m$ and repeat (b) until you have six sets of values of $m$ and $T$ . Do not adjust the string in the split cork.
Record your results in a table. Include values of $T^2$ in your table.

10M

(d)

(i)

Plot a graph of $T^2$ on the $y$ -axis against $m$ 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 = ______

(e)

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

T^2 = am + b

where $a$ and $b$ are constants.

Use your answers from (d)(iii) to determine the values of $a$ and $b$ . Give appropriate units.

$a$ = ______
$b$ = ______

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Q2Manipulation, Measurement and Observation · Analysis, Conclusions and Evaluation · Presentation of Data and Observations20M

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