Question: A tightly wound spring is made from a 2 0 - mm - diameter bar of 0 . 2 % C - hardened steel (

A tightly wound spring is made from a 20-mm-diameter bar of 0.2% C-hardened steel
(G=80109Nm2). The coil diameter is 20 cm . The spring has 30 coils. What is the
largest force that can be applied such that the elastic strength in shear of 220106Nm2
is not exceeded? What is the change in length of the spring when this force is applied?
A tightly wound spring is made from a 2 0 - mm -

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