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Edexcel | Physics 4PH0 | S 10 3 | Q1

S 10 3

1

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A student investigates the extension which occurs when a load is added to a plastic

spring.

The diagram shows the equipment he uses.

The load is a carrier and discs.

The pin shows the position of the bottom of the load.

S 10 3

1

(a) (I)

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1 Mark

How many discs are on the carrier?

Acceptable Answers

Extra Information

six/6

aps

S 10 3

1

(a) (II)

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2 Mark s

The carrier and pin weigh 0.2 newtons and each disc weighs 0.1 newtons.

Calculate the total load, in newtons, acting on the spring shown in the diagram.

................................................................................................................................

Total load = ............................. N

Acceptable Answers

Extra Information

0.8 (N)

ecf from (a)(i) e.g. (5 x 0.1) + 0.2 = 0.7

(N)

allow (1) for correct method

(n × 0.1) + 0.2 but wrong calculation or

wrong n (i.e. not 6 or ecf)

e.g. (6 x 0.1) + 0.2 = 0.7

S 10 3

1

(b) (I)

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1 Mark

What reading, in centimetres, is shown by the pin?

Reading = .............................. cm

21.2 (cm)

S 10 3

1

(b) (II)

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2 Mark s

When additional discs are added to the carrier, the pin shows a reading of

22.1 cm. Calculate the increase in the extension, in millimetres, produced by this

additional load.

Increase in extension = .......................... mm

Acceptable Answers

Extra Information

9 (mm)

allow (1) for correct method

e.g. 221 – answer to (b)(i) in mm

allow (1) for 0.9 (cm) or other pot error

S 10 3

1

(c)

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The student’s friend carries out a similar investigation on a different spring.

She draws a graph.

S 10 3

1

(c) (I)

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1 Mark

Mark clearly on the graph all the section where extension is proportional to

load.

Acceptable Answers

Extra Information

all the range from the origin to

the end of the straight line

section

expect a clear mark at the

top of the section and an

indication whether the

section is above or below

this mark

do not credit a response

which exceeds this range

S 10 3

1

(c) (II)

Add To Classified

1 Mark

A similar investigation is carried out using a spring which is easier to extend.

Sketch, on the above axes, the graph you would expect.

Acceptable Answers

Extra Information

starts at the origin, similar to

original but steeper

must not cut original line

allow a (steep) curve

(but not if it bends back on

itself)

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