Measurements in the 1800s showed that a draft horse could provide a maximum steady output power over the course of a working day; that’s how the "horsepower," about 750 W, came to be defined. Another animal that’s used for pulling loads for which there are good data is the sled dog. A 38 kg dog can provide power to pull a sled with a force of 60 N at a steady 2.2 m/s. Dogs and horses have approximately the same 25% metabolic efficiency as humans.|| BIO INT A horse is working steadily, providing 750 W of output power. How much food energy does the horse need to work for 1 hour, to the nearest MJ?A. 3 MJB. 5 MJC. 9 MJD. 11 MJ|| BIO INT How many sled dogs would be needed to provide 1 horsepower?A. 6B. 12C. 14D. 20|| BIO INT A dog pulls a sled that requires a 120 N pulling force. How fast can the dog pull the sled, to the nearest m/s?A. 1 m/sB. 2 m/sC. 3 m/sD. 4 m/s