Strenght of Materials

Q.
In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates)
A. `(Wl)/(nbt^2)`
B. `(3Wl)/(2nbt^2)`
C. `(2Wl)/(nbt^2)`
D. `(3Wl)/(nbt^2)`

Answer : Option B

Explanation :