A 500 kg horse can provide a steady output power of 750 W (that is, 1 horsepower) when pulling a load. How about a 38 kg sled dog? Data show that a 38 kg dog can pull a sled that requires a pulling force of 60 N at a steady 2.2 m/s. What are the specific power values for the dog and the horse? What is the minimum number of dogs needed to provide the same power as one horse?