How fast was a motorcycle going to skid 47 feet brakes locked up?

The speed at which a motorcycle would skid 47 feet with the brakes locked can vary based on factors like road conditions, tire type, and the motorcycle's weight. However, a general estimate is that it would likely be traveling at around 30 to 40 mph when the brakes were applied. To come to a complete stop over 47 feet, it would need sufficient deceleration, which typically occurs at these speeds. For precise calculations, more specific data about the motorcycle and conditions would be required.