YOU NEED …
large basket from
the cardboard sheet
string
zipline
trolley
HERE’S HOW!
1
Remove the large basket from the cardboard
sheet and fold it together, as shown in the
illustrations. Fold over the long flap and stick
it down on the base with craft glue or tape.
Then tuck the Pepper Mint figure into the
holder in the bottom of the basket.
2
Thread a one-meter long piece of string
through both wheels of the trolley.
3
Fasten one end of the string to the treehouse
— there are two holes for this on the two top
level platforms — and hang the basket on
the peg at the bottom of the trolley.
Pepper Mint
figure
You will also need: craft glue, adhesive tape
?
WHAT’S HAPPENING
As soon as you fix the basket onto the zipline, you take away some of its freedom. Its movement
is now limited by the string. Now if you let go of it, gravity doesn’t just make it fall vertically to
the ground, but instead it moves downward along the zipline. You can change three things: the
steepness of the slope (by changing the difference in height between the beginning and end of
the string), the length of the string, or the weight of the basket. The steeper the slope and the
heavier the load, the faster the basket travels to the bottom. That is because of acceleration
and gravitational force. Both of these increase if the “mass” of the basket increases.
Tip!
Ask your parents to help you find the
perfect place to hang your zipline. The
maximum load for the basket is 500 g!
You can tie the other end of the string onto a chair
leg or hold it in your hand.
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21
ipline
and the
