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Engineering ToolBox > Belts - Power Transmissions and Efficiency
The torque available at the driven wheel or pulley can be expressed as
T = (F2 - F1) ra (1)
where
T = torque (Nm)
F = force (N)
r = radius wheel or pulley
The available power can be expressed as
P = T ωa = (F2 - F1) ra (2)
where
P = power transmitted (Watts)
ω = angular velocity (rad/s)