Greater Mass Equals Greater Inertia

This is kind of a no-brainer....objects with greater mass have greater inertia.  You know that boulder that sits on top of another boulder?  You've been to that park, haven't you? 

The top boulder is big and it's not moving...for thousands of years it hasn't moved...it has resisted movement for so long!! Can you think of anything greater that could knock it off its rocky pedestal?  

Yep, an earthquake and it would have to be a pretty powerful earthquake too!  Let's think of mass this way... 

Which would be easier to push?  

An elephant or a mouse?

Those two elephants are about the same mass, so the pusher was able to push the other elephant into the water.  What about you?  Could you, of lesser mass, push an elephant into the water?  

We can push different masses to a certain point and then it would be like pushing an elephant, something of greater mass....the greater mass the more resistant it is to movement (INERTIA).

Could we say, the more INERTIA there is, the larger the MASS?  Sure!  

I love inertia!  Being the large mass can be so satisfying!