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OverLord2011 [107]
3 years ago
12

Does anyone know how to do this?​

Physics
1 answer:
SIZIF [17.4K]3 years ago
8 0

Explanation:

By Hooke's Law,

F=kx

The only force acting here is weight, and x is the extension of the string (you need to convert this to mm) so

mg=kx

(0.15)(9.81)=k ((420-300)x10^-3)

Then just solve this equation.

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