A hanging chair is suspended on a spring from the ceiling. The 5880 N/m spring stretches from 15 cm long to 25 cm long when you sit in the chair. How hard is the spring pulling to lift you?

588 N

Explanation:

Hook's Law: Hook's Law states that the Force applied to an elastic material is directly proportional to its extension, provided that the elastic limit is not exceeded.

From Hook's Law,

F = ke Equation 1

Where F = applied force, k = spring constant, e = extension.

Given: k = 5880 N/m, e = 25-15 = 10 cm = 0.1 m.

Substitute into equation 1

F = 5880(0.1)

F = 588 N

Hence the spring is pulling 588 N hard to lift me

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