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
K
E
=
1
2
m
v
2
(1 point)
Responses
451,584.0 J
451,584.0 J
90,480.6 J
90,480.6 J
4,812.8 J
4,812.8 J
180.961.3 J
To calculate the kinetic energy, we can use the formula KE = 1/2 * m * v^2.
Plugging in the given values:
m = 512 kilograms
v = 18.8 meters per second
KE = 1/2 * 512 * (18.8)^2
= 1/2 * 512 * 354.4
= 1/2 * 181,964.8
= 90,982.4 J
Therefore, the horse and its jockey have a kinetic energy of 90,982.4 J.
The closest option provided is 90,480.6 J.