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peaceandlove
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Homework Statement
A 50 g mass hanger hangs moitionless from a partially stretched spring. When a 91 gram mass is added to the hanger, the spring stretch increases by 7 cm. What is the spring constant of the spring (in N/m)? (Assume g = 9.79 m/s2.)
Homework Equations
F=k(delta)L-mg
k(delta)L(sub_e)=mg
(delta)L=(delta)L(sub_e)-y
The Attempt at a Solution
I tried to use the three formulas above to solve for k, however; since I don't know the equilibrium position, I can't find y, which is the displacement of the mass from the equilibrium position.