Subject
When a force Facts on a helical spring of wire diameter d and mean coil diameter D,
then the maximum torsional shear stress t is given by:
8FD 16FD 4F
A)
16FD
8 FD
B).
4F
-+
+
πd3
D).
πd3 ad?
πd2
ad
πd3
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sorry I don't understand this question
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