Load Extension Worksheet Marking scheme

- Mark Scheme /


Question Answer Marks AO Element Notes Guidance

1 straight line through / from origin 2
with positive gradient up to 175
N (1)
smooth curve after 175 N with
increasing positive gradient
(1)

2(a) 0.12 m 1

2(b) beyond where the extension is 2
not directly proportional to the
load OR
(point) where extension stops
being directly proportional to the
load OR
point up to which extension is
directly proportional to the load
(1)
10.4 N ≤ weight ≤ 10.9 N (1)

2(c) 22 N / m ≤ k ≤ 25 N / m (1) 3
clear subtraction of 0.12 from a
length that is in Hooke's law
region e.g. 0.54 − 0.12 (1)
k = F / x in any form OR
k = W / x in any form OR
k = 1 / gradient (1)

3(a) (15 + 38) = 53 (m) 1