Physics 9702/35 — May/June 2013

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 an oscillating system depends on the mass attached to the system.

(a)

(i)

Set up the apparatus as shown in Fig. 1.1.

Fig. 1.1

Slide the two longer loops of string onto a rule and fix this rule in the clamps.

Adjust the clamps until the rule is parallel to the bench.

Slide the shorter loop onto the second rule and use the longer loops to support this second rule.

Both rules should have their markings facing you. The strings should be vertical, $20\text{ cm}$ apart and equal distances from the centre of the second rule.

Use the shorter loop of string to suspend a mass $m$ at the $50\text{ cm}$ mark on the second rule, where $m = 0.500\text{ kg}$ .

(ii)

Move the end A of the lower rule towards you and the end B away from you.
Release the rule and watch the movement.
End A will move away from you and back towards you, completing a swing.
The time taken for one complete swing is $T$ .
By timing several of these complete swings, determine an accurate value for $T$ .

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

(b)

Change $m$ and repeat (a)(ii) until you have six sets of values of $m$ and $T$ .

Include values of $\frac{1}{T^2}$ in your table.

10M

(c)

(i)

Plot a graph of $\frac{1}{T^2}$ 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 = ______

(d)

The quantities $m$ and $T$ are related by the equation

\frac{1}{T^2} = Pm + Q

where $P$ and $Q$ are constants.

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

$P$ = ______
$Q$ = ______

The rest of this paper

1 more questions

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

Loading the full paper…