A football of mass 0.4kg is kicked at 12m/s, while a cricket ball of mass 0.2kg moves at 20m/s. Choose the correct comparison of their momentum and inertia.
a) The cricket ball has greater momentum but smaller inertia
b) The football has greater momentum but smaller inertia
c) The football has greater momentum and greater inertia
d) Both balls have approximately equal momentum, but the football has greater inertia