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?
The kinetic energy of an object is given by the equation:
Kinetic energy = (1/2) * mass * velocity^2
Plugging in the given values:
mass = 512 kg
velocity = 18.8 m/s
Kinetic energy = (1/2) * 512 kg * (18.8 m/s)^2
Kinetic energy = 0.5 * 512 kg * (353.44 m^2/s^2)
Kinetic energy = 89408.64 joules
Therefore, the horse and its jockey have a kinetic energy of 89408.64 joules.