What physical quantity is a measure of the amount of inertia an object has?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

The mantle is made up of which structural zones?