Forces On Our Particle

Suppose a convective force exists on the particle, not just a Brownian force. First our particles own inertia would slow it. Let some number be the coefficient of inertia or the effective mass of our particle. It is not our particle's actual mass, because our convective force pushes water aside as it pushes our particle. A unidirectional force gives a mass moving over distance. If the force is steady, there is a fluid drag proportional to our particle's velocity. The complex viscosity of hemolymph also resists this flow. We also irreversibly lose heat due to friction. We cannot get kT if we cannot have these heat producing losses due to drag.

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