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A Level Physics Unit 2 Question

I am confused at why for this question (http://imgur.com/a/1kQxH) to calculate the work done on the spring to squeeze it, the equation is
W= f*d*0.5 and not W=f*d.
Thanks!
(edited 7 years ago)
I think that equation is in the formula booklet? E=1/2Fx where E is work done, as it is the energy transferred to the spring.

An explanation as to why there is a half there....

Imagine drawing a force-extension graph for the spring. What will it look like? The hint is that it follows Hooke's Law.

Spoiler

(edited 7 years ago)
Reply 2
Thanks for the help

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