軽くならない動滑車 Strange Pulleys 右側の動滑車は、おもりが2個対1個でつり合っているのに、左側の動滑車は、おもりが1個対1個でつり合っている・・・。 どこかが変かな？ Look, the the movable pulley on the left hand is keeping the balance with its weights 1 piece versus 1 piece, while the movable pulley is keeping the balance with its weights 2 pieces versus 1 piece. That's funny isn't it? 右のオモリで２倍の重さと釣り合うはずなのに？ Do you think there are two weights on the left hand and one on the right? ▼マウスをあててみよう！ 動滑車もオモリのうち ▼On mouse here! The movable pulley is also acting as an weight. 動滑車と定滑車という機構の原理と、その時見落としてしまう事を体験します。