Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force)

3 Pc
1 Pc
2 Pc
Pc/3

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Have variable bending moment (M) in each leaf
Obtain variable moment of inertia (I) in each leaf
Permit each leaf to act as an overhanging beam
Make M/I constant throughout the length of the leaf

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Machine Design
Spring stiffness is

Its capability of storing energy
Its ability to absorb shocks
Load required to produce unit deflection
Ratio of coil diameter to wire diameter

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