In this experiment, you will investigate a pendulum with a mass fixed at each end. (a) • Assemble the apparatus with the nail passing through the third hole from C, as shown in Fig. 1.1. • Ensure that the nail is held securely in the clamp. • The distance between the nail and C is $x$, as shown in Fig. 1.1. Measure and record $x$. $x$ = \_\_\_\_\_\_ $\text{cm}$ (b) • Push the bottom of the strip horizontally through a distance of approximately $5\text{ cm}$. Release the…

Physics 9702/33 — February/March 2019

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 a pendulum with a mass fixed at each end.

(a)

• Assemble the apparatus with the nail passing through the third hole from C, as shown in Fig. 1.1.
• Ensure that the nail is held securely in the clamp.

Fig. 1.1

• The distance between the nail and C is $x$ , as shown in Fig. 1.1.
Measure and record $x$ .

$x$ = ______ $\text{cm}$

(b)

• Push the bottom of the strip horizontally through a distance of approximately $5\text{ cm}$ . Release the strip so that it oscillates.
• Determine the period $T$ of these oscillations.

$T$ = ______ $\text{s}$

(c)

Change $x$ by positioning the nail in a different hole and repeat (b). Repeat until you have six sets of values of $x$ and $T$ .

Record your results in a table. Include values of $\frac{1}{x}$ and $T^2$ in your table.

(d)

(i)

Plot a graph of $T^2$ on the $y$ -axis against $\frac{1}{x}$ 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 $x$ are related by the equation

T^2 = \frac{a}{x} + b

where $a$ and $b$ are constants.

Use your answers in (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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