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A racehorse is running at 42 miles per hour, equivalent to 18.8 meters per second. The horse and its jockey have a combined
mass of 512 kilograms. How much kinetic energy do they have?
KE=/m²
O 4,812.8 J
O 451,584.0 J
O 180.961.3 J
O 90,480.6 J