A graph shows the Force of a spring (y axis) against Displacement (x axis) in a linear function. An obvious point for the gradient is the point (0.5 metres, 140 Newtons). What is the spring constant and how much energy is stored in the spring when it is compressed by 0.5 metres?(adsbygoogle = window.adsbygoogle || []).push({});

Hope the description helps.

Hooke's law states: F=-kx

Therefore: 140=-0.5k

Therefore: k=-40/0.5=-80 (But I thought spring constant cannot be negative?)

Also, no idea how to work out energy stored.

Any help will be appreciated! Thanks

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# Hooke's law = negative spring constant?

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