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?
K E = 1/2mv^2
90,480.6 J
451,584.0 J
180,961.3 J
4,812.8J
To find the kinetic energy, we can use the formula KE = 1/2 * m * v^2.
Given:
Mass (m) = 512 kg
Velocity (v) = 18.8 m/s
Using the formula, we can calculate the kinetic energy:
KE = 1/2 * 512 kg * (18.8 m/s)^2
KE = 1/2 * 512 kg * (354.4 m^2/s^2)
KE = 1/2 * 181,548.8 kg * m^2/s^2
KE ≈ 90,774.4 J
Therefore, the kinetic energy of the horse and its jockey is approximately 90,774.4 J.