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=12mv2
(1 point)
Responses
90,480.6 J
90,480.6 J
4,812.8 J
4,812.8 J
180.961.3 J
180.961.3 J
451,584.0 J
The correct answer is 90,480.6 J
KE=12mv^2
KE=0.5 * 512kg * (18.8 m/s)^2
KE= 0.5 * 512kg * 353.44m^2/s^2
KE= 90,480.6 J