Klopfte eines Tages ein Mann an meine Tür und bat mich, ein Beschäftigungsbuch für euch zusammenzustellen. Es sollte Spiele enthalten, Bastel- und Werkarbeiten, bunt durcheinander, damit Jungen und Mädchen für jede Gelegenheit und Jahreszeit und für jeden Geschmack etwas finden könnten, was ihnen Spaß macht.
Now you are ready to find out if the pulleys
will help you lift the books.
First take hold of the cord around the books, as Picture 1 shows you.
Lift them to find out how heavy they are.
Then lift them by pulling on the cord that goes through the pulleys, as Picture 2 shows.
Which way is easier?
In this experiment the cord goes back and forth between two pulleys four times. Do you think it would be as easy to lift the books if the cord did not go back and forth so many times?
will help you lift the books.
First take hold of the cord around the books, as Picture 1 shows you.
Lift them to find out how heavy they are.
Then lift them by pulling on the cord that goes through the pulleys, as Picture 2 shows.
Which way is easier?
In this experiment the cord goes back and forth between two pulleys four times. Do you think it would be as easy to lift the books if the cord did not go back and forth so many times?