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Sagot :
Answer:
- K= F/∆l
- F=K•∆l
- ∆l=F/K
- so we know that the K is 0.70N/m
- the ∆l which is the elongation is 1.5 m
- to find the force which is F u have to apply the formula.
- by applying the formula you get 1.05N
- for the second force you get 3.5N
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