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Physics · May / June 2020 · Paper 62 · Question 4

0625

As printed in the paper

The question as text

A student investigates the bending of 1 m length strips of different materials. She compares how far they bend when loaded at one end. Plan an experiment to investigate how the material from which the strips are made affects the bending of the strips when loaded at one end. The following apparatus is available to the student: strips of wood, plastic, steel and aluminium, each of length 1 m a set of slotted masses a metre rule a G-clamp (used to hold the strips to the laboratory bench). Other apparatus normally available in a school laboratory can also be used. In your plan, you should: • draw a diagram to show the arrangement of the apparatus • explain briefly how you would carry out the investigation, including the measurements you w • state the key variables to be kept constant • draw a suitable table, with column headings, to show how you would display your readings (y not required to enter any readings in the table) • explain how you would use the results to reach a conclusion.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

MP1

diagram showing strip clamped to bench with majority overhanging

MP2

means to measure bending, e.g. vertical metre rule at end of strip

MP3

add load at / near end of strip and measure the amount of depression

MP4

repeat with other strips

MP5

variables

any one from:

all strips to have same width / thickness / profile

use of same load(s)

allowance for unloaded depression

MP6

table with columns for material, load and depression with correct units

MP7

strip that bends most with same load is most bendy / alternative wording

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