Winches

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Velocity Ratio

The velocity ratio can be expressed as

VR = R / r     (1)

where

VR = velocity ratio

R = effort force radius (m)

r = load radius (m)

Effort Force

Force to raise a load can be expressed as

F = W / μ VR 

   = W r / μ R 

   = m g r / μ R    (2)

where

F = force (N)

μ = mechanical efficiency of the system (equal to one for an ideal frictionless system,  a fraction less than one for real-world systems with energy losses due to friction)

m = mass (kg)

g = acceleration of gravity (kg/m²)

W = weight (N)

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Related Topics

• Dynamics - Dynamics Motion - velocity and acceleration

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