A rod with resistance R lies across frictionless conducting rails in a constant uniform magnetic field B, as shown.Assume the rails have negligible resistance.The magnitude of the force that must be applied by a person to pull the rod to the right at constant speed v is: 
Definitions:
Cam-to-bushing Radial
Refers to the radial clearance or distance between a camshaft and its surrounding bushing, critical for proper mechanical operation.
S-cam Assembly
A mechanical component used in drum brake systems of heavy vehicles, converting the linear force of air brake actuators into a rotational movement to apply the brake.
Air Dryer
A device usually located downstream from the compressor designed to remove moisture from the air system. Air dryers use two principles to eliminate air from an enclosed brake circuit, cooling/condensation and desiccant media.
Linehaul Truck
Trucks used for long-distance hauling, commonly part of freight and logistics operations.
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