Answer:
KE = 2560 Joules
Explanation:
The kinetic energy (KE) of the running back can be calculated using the formula:
KE = 1/2 * m * v^2
where m is the mass of the running back, and v is the velocity of the running back.
Substituting the given values into the formula, we get:
KE = 1/2 * 80 kg * (8 m/s)^2
KE = 1/2 * 80 kg * 64 m^2/s^2
KE = 2560 Joules
Therefore, the KE of the running back is 2560 Joules.