Hooke's law calculator to find spring displacement, spring constant and restoring force of a spring.
Hooke's law formula is F=kx. Here k stands for spring constant, x is
displacement or change in length of the spring and F is the restroring
force. The spring exerts a force in the opposite direction to the displacement acting to return the spring to its natural length (hence there
is minus sign in the formula. The unit of spring constant is N/m, force is N and displacement is m.
Hooke's law is accurate as long as x is not too great.
Note: Use dot "." as decimal separator.
RESULTS 
Spring Constant [k] 

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Displacement [x] 

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Force [F] 

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Note: Default rounding is 7 decimal places.
A dart of mass 0.200 kg is pressed against the spring of a dart gun. The spring, with spring stiffness constant k=200 N/m , is compressed 60
mm. What is the restoring force of the spring?