Physics · May / June 2024 · Paper 61 · Question 4
0625
As printed in the paper
The question as text
A student investigates the bending of composite strips of wood when they are loaded at one end. The composite strips are made from identical layers of wood stuck together, as shown in Fig. 4.1. Plan an experiment to investigate how much composite strips bend when they are loaded at one end. Fig. 4.2 shows the set-up the student uses. The student has a number of composite strips made with two or more layers of wood. wood adhesive Fig. 4.1 floor composite strip bench clamp Fig. 4.2 In your plan: • state the variable that you are testing • list any additional apparatus that you would use • explain briefly how to do the investigation • state the key variables to keep constant • draw a table, or tables, with column headings, to show how to display your readings (you are not required to enter any readings in the table) • explain how to use your readings to reach a conclusion.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
MP1
additional apparatus:
(metre) ruler / tape (measure)
MP2
method mark 1:
add a load and measure the amount of bending
MP3
method mark 2:
repeat with a different load applied OR different length (overhanging) OR a different number of layers of wood in composite strip
MP4
variable kept constant:
load (if varying length mentioned in MP3) OR length (if varying load mentioned in MP3)
MP5
variable kept constant:
number of layers of wood
MP6
table:
with clear columns for deflection with matching unit and for chosen variable – all with quantity and unit (or no unit for number of strips)
MP7
conclusion:
plot graph of deflection against chosen variable OR graph / bar chart of deflection against number of layers OR an answer which suggests comparing values in table of chosen variable and deflection
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