Physics 9702/33 — May/June 2016

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 wooden strip acted on by several forces.

(a)

(i)

Set up the apparatus as shown in Fig. 1.1.

Fig. 1.1

The mass $m$ should be $100\text{ g}$ .

The angle $\theta$ between the wooden strip and the string should be approximately $45^{\circ}$ .

(ii)

Adjust the apparatus so that the spring is vertical and the wooden strip is parallel to the bench.

(b)

(i)

Record the mass $m$ .

$m$ = ______

(ii)

Measure and record the length $y$ of the coiled part of the spring.

$y$ = ______

(iii)

Measure and record $\theta$ .

$\theta$ = ______

(c)

(i)

Add $100\text{ g}$ to the mass hanger.

(ii)

Adjust the height of the boss holding the nail until the wooden strip is parallel to the bench.

(iii)

Measure and record $m$ , $y$ and $\theta$ .

$m$ = ______
$y$ = ______
$\theta$ = ______

(d)

Change $m$ and repeat (c)(ii) and (c)(iii) until you have six sets of values of $m$ , $y$ and $\theta$ .

You may include your values from (b) and (c).

Include values of $m \sin \theta$ in your table.

10M

(e)

(i)

Plot a graph of $y$ on the $y$ -axis against $m \sin \theta$ 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 = ______

(f)

The quantities $y$ , $m$ and $\theta$ are related by the equation

y = Pm \sin \theta + Q

where $P$ and $Q$ are constants.

Using your answers in (e)(iii), determine the values of $P$ and $Q$ .
Give appropriate units.

$P$ = ______
$Q$ = ______

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