In this experiment you will investigate how the motion of a paper strip depends on its width. (i) Measure and record the width $x$ of the thin paper strip, as shown in Fig. 1.1. $x$ = \_\_\_\_\_\_ $\text{cm}$ (ii) Connect the clips to the strip, as shown in Fig. 1.2. (i) Set up the apparatus with the top clip supported on the nail, as shown in Fig. 1.3. (ii) Twist the wooden rod through an angle of approximately $45^{\circ}$ in a horizontal plane, as shown in Fig. 1.4.…

Physics 9702/33 — May/June 2011

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 how the motion of a paper strip depends on its width.

(a)

(i)

Measure and record the width $x$ of the thin paper strip, as shown in Fig. 1.1.

Fig. 1.1

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

(ii)

Connect the clips to the strip, as shown in Fig. 1.2.

Fig. 1.2

(b)

(i)

Set up the apparatus with the top clip supported on the nail, as shown in Fig. 1.3.

Fig. 1.3

(ii)

Twist the wooden rod through an angle of approximately $45^{\circ}$ in a horizontal plane, as shown in Fig. 1.4.

Fig. 1.4

Release the rod and watch its movement.
The wooden rod completes one swing by twisting one way and then back the other way, as shown in Fig. 1.4.
The time taken for each complete swing is $T$ .
By timing several of these complete swings, determine an accurate value for $T$ .

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

(c)

By cutting new strips from the graph paper, repeat (a) and (b) until you have six sets of values of $x$ and $T$ . Values of $x$ should be in the range $1\ \text{cm} \leq x \leq 6\ \text{cm}$ .

Include values of $\frac{1}{x}$ in your table of results.

(d)

(i)

Plot a graph of $T$ 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 relationship between $T$ and $x$ is

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

where $a$ and $b$ are constants.

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

$a$ = ______
$b$ = ______

(f)

State one problem with determining an experimental value of $T$ for $x = 15\ \text{cm}$ .

The rest of this paper

1 more questions

Q2Manipulation, Measurement and Observation · Presentation of Data and Observations · Analysis, Conclusions and Evaluation20M

Loading the full paper…