A close helical spring of 100 mm mean diameter is made of 10 mm diameter rod, and has 20 turns. The spring carries an axial load of 200 kN with G = 8.4 × 104 N/mm2. The stiffness of the spring is nearly

A close helical spring of 100 mm mean diameter is made of 10 mm diamet

1.	A close helical spring of 100 mm mean diameter is made of 10 mm diameter rod, and has 20 turns. The spring carries an axial load of 200 kN with G = 8.4 × 104 N/mm2. The stiffness of the spring is nearly
A.	5.25 N/mm
B.	6.50 N/mm
C.	7.25 N/mm
D.	8.50 N/mm
Answer» B. 6.50 N/mm

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A close helical spring of 100 mm mean diameter is made of 10 mm diameter rod, and has 20 turns. The spring carries an axial load of 200 kN with G = 8.4 × 104 N/mm2. The stiffness of the spring is nearly

A close helical spring of 100 mm mean diameter is made of 10 mm diameter rod, and has 20 turns. The spring carries an axial load of 200 kN with G = 8.4 × 104 N/mm2. The stiffness of the spring is nearly

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