Today’s Problem: Earth to George

Materials needed: a U.S. quarter, a 15 millimeter square of paper

Can you drop both the quarter and the square of paper from the same height and at the same time, so that they reach the ground at the same time?

Quarter

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Today’s Problem: News Bulletin

Which is easier to push into a bulletin board, a thumbtack or a paper clip like the one in the picture?paper-clip