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Edexcel | Physics 4PH0 | W 17 1 | Q3

W 17 1

3

A student investigates a toy.

● the toy has three woodpeckers

● each woodpecker is attached to a wooden ring by a spring

● a metal rod passes through the wooden rings

● the woodpeckers have different masses

● the springs are identical

When a woodpecker is pulled back and released, it vibrates and moves down the rod.

W 17 1

3

(a)

A student uses this method to investigate the toy.

● measure the mass of woodpecker A

● move woodpecker A to the start point and release it

● record the time it takes for woodpecker A to travel 20 cm

● repeat the test two more times

The student uses the same method for woodpeckers B and C.

The table shows the student’s results.

W 17 1

3

(a) (I)

1 Mark

One of the time measurements in the table is anomalous.

Draw a circle around this anomalous measurement.

3.1 ONLY circled in the table;

W 17 1

3

(a) (II)

1 Mark

State the relationship between average speed, distance moved and time taken.

(average) speed = distance (moved)/time

(taken);

accept words or

standard symbols

W 17 1

3

(a) (III)

4 Mark s

Calculate the average (mean) speed for woodpecker B.

average speed = ............................................. cm/s

discards anomalous result;

calculates mean time for B;

substitution;

evaluation;

e.g.

average time = 4.7 gets 1 marks

average time = 5.5 gets 2 marks

speed = 20/ 5.5 gets 3 marks

=3.7 gets 4 marks

allow 4.67

Allow 5.45

allow 20/5.45

Allow 3.67

W 17 1

3

(a) (IV)

2 Mark s

Explain what type of graph the student should use to present his data.

explanation including the following ideas

EITHER

bar chart;

because woodpeckers are discrete / eq;

OR

mass is a continuous variable;

therefore scatter-gram / eq;

condone histogram

DOP

allow line graph

W 17 1

3

(b)

3 Mark s

Before carrying out his investigation, the student made this prediction.

Discuss whether the student’s results support his prediction.

discussion to include any 3 ideas from:

MP1. there is no (discernible) pattern;

MP2. supporting data quoted;

MP3. discussion of why prediction is wrong/ C

should be fastest;

MP4. three data sets is insufficient to decide;

MP5. need for further data to extend range of

results;

no mark for

unqualified ‘yes’ or

‘no’

results don’t go in

order/eq

allow calculated

speeds (cm/s)

A= 1.8

B= 3.7 (4.3)

C = 2.3

A heaviest,slowest;

B middle, fastest;

C lightest, middle

ignore discussion of

anomalies

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