Fill in the blanks to complete each statement about mountains.
several mountains together form a mountain a few of these combined form a mountain system. several systems combined form a mountain which can stretch thousands of miles in

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?