If you tried to push a sack of unpopped popcorn or a sack of popped popcorn, both of the same volume, would it be easier to push the
sack of unpopped popcorn sack of popped popcorn?
A B
Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.
difficulty in overcoming friction
heavier
harder
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an objects weight
easier
popcorn
to push
to push