Here's how to calculate the momentum of the football:

1. Convert Units:

* Mass: Convert grams to kilograms (1 kg = 1000 g)

453 g * (1 kg / 1000 g) = 0.453 kg

* Speed: Convert miles per hour to meters per second (1 mph ≈ 0.447 m/s)

30 mph * (0.447 m/s / 1 mph) ≈ 13.41 m/s

2. Calculate Momentum:

* Momentum (p) = mass (m) * velocity (v)

p = 0.453 kg * 13.41 m/s

p ≈ 6.07 kg·m/s

Therefore, the momentum of the football is approximately 6.07 kg·m/s.