Final answer:
The momentum of a 121.1-kg fullback running at a velocity of 3.091 m/s is calculated using the formula p = mv and is approximately 374.26 kg·m/s.
Step-by-step explanation:
To calculate the momentum of a fullback in motion, you would use the formula p = mv, where p is momentum, m is mass, and v is velocity. In this case, the fullback has a mass m of 121.1 kg and a velocity v of 3.091 m/s. Plugging in these values, the momentum p is:
p = (121.1 kg)(3.091 m/s) = 374.2611 kg·m/s
Therefore, the momentum of the 121.1-kg fullback running at a velocity of 3.091 m/s is approximately 374.26 kg·m/s.