Molecules like dna may be stretched and are well modeled as springs. an optical trap can pull with a maximum force of 11\; fn11fn (femto-newtons) and can stretch a dna molecule by 0.06\; \mu m0.06μm . what is the spring constant of the molecule?

1.8 x 10⁻⁷ N/m

Explanation:

= maximum force with which the optical trap can pull = 11 x 10⁻¹⁵ N

x = stretch caused in DNA molecule due to the force = 0.06 x 10⁻⁶ m

k = spring constant of the spring

Maximum force is given as

k = 1.8 x 10⁻⁷ N/m

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