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ppk ppk
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A ball falls from the top of a building, through the air (air friction is present), to the ground below.  How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building?
A) K is equal to U.
B) K is greater than U.
C) K is less than U.
D) It is impossible to tell.
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bio_manbio_man
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