5 ms·in physics inertia means both "not willing to move" and "not willing to stop"by ericwan 18y agoin physics inertia means both "not willing to move" and "not willing to stop"eru 18y agoIntertia and momentum are even different things in physics.demallien 18y agoThink of it this way: Whilst I'm creating inertia, what are the units that I will use to measure the quantity produced?