Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of

A) less than 100 J.
B) 100 J.
C) more than 100 J.


Answer: B

Physics & Space Science

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The Copernican (heliocentric) model explained things better than the Ptolemaic (geocentric) model, except:

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Physics & Space Science