Tension in springs (I don't know where 2 start)

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The discussion revolves around solving problems related to spring tension using Hooke's Law. The elasticity constant is crucial for determining the restoring force when a spring is compressed or stretched. Participants seek clarification on the equations that relate spring constant, stretch distance, and force. The main focus is on applying Hooke's Law to find the necessary values for given scenarios. Understanding these concepts is essential for accurately solving the homework problems presented.
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Homework Statement



1) a spring has an elasticity constant of 225 Newtons/meter. What is its restoring for when it's compressed of 20 centimeters ?

2) with what force must we pull a spring to pull 8 centimeters if its elasticity constant is 2 Newton/cm ?

3) we suspend a weight of 4.08 kg to a spring and it pulls 8.5 cm
a) what is the elasticity constant
b) what force do you need to put to compress the spring 15 cm ?

Homework Equations



I honestly do not know beside Lnat, m1, L1, L2 and m2 I guess
Something with Hooke's law

The Attempt at a Solution



There's something missing for me to understand this problem :|
 
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For 1 and 2, what equation do you have that relates the spring constant and the stretch distance with force?
 

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