Easy -1.8 This is a direct one-step application of Hooke's Law (F = kx) requiring only substitution: 20 = k(0.6-0.4), so k = 100. It's a 1-mark multiple choice question testing basic recall with no problem-solving element, making it significantly easier than average A-level questions.
A light spring of natural length 0.6 metres is compressed to a length of 0.4 metres by a force of 20 newtons.
The stiffness of the spring is \(k\) N m\(^{-1}\)
Find \(k\)
Circle your answer.
[1 mark]
20 50 100 200
A light spring of natural length 0.6 metres is compressed to a length of 0.4 metres by a force of 20 newtons.
The stiffness of the spring is $k$ N m$^{-1}$
Find $k$
Circle your answer.
[1 mark]
20 50 100 200
\hfill \mbox{\textit{AQA Further AS Paper 2 Mechanics 2021 Q1 [1]}}