Thames & Kosmos Pepper Mint in the Great Treehouse Engineering Adventure handleiding

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Thames & Kosmos

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Handleiding

REMEMBER

Both pulley systems need the same amount of

“work” to pull the basket up to the top. With the

ﬁxed pulley you need the full amount of energy,

but only one length of rope. If you use the ﬁxed

pulley and the movable pulley together, you only

need half as much eﬀort, but you have to pull

twice as far (two lengths of rope).

Aach your hoist to the treehouse and transport small “loads” up to the top. Don’t ever hang more

than 500 g (the weight of two sticks of buer) on your hoist!

WHAT’S HAPPENING

Your basket is now hanging on two strings.

The “movable pulley“ moves upward when

you pull on the end of the string. Did you

notice that it’s also easier to pull the

basket up to the top? In fact you need

exactly half as much “eﬀort” (or “force”).

By using one ﬁxed and one movable

pulley, this “block-and-tackle” hoist has

changed three things:

1) You’re pulling downward instead of

upward.

2) You only need to use half as much

eﬀort to pull the basket up to the

top.

3) But you need twice as much

string — double the length — to

transport Pepper up to the top.

… Hang the basket onto the lower hook, the

one you knoed the string onto. Put your

Pepper Mint ﬁgure, or a pile of coins, into the

basket and try pulling it up to the top.

Now you’re going to add a “movable pulley”.

Swap the two hooks around: Now the hook with

the loose string is carrying the basket. Aach

the other hook, the one that’s knoed onto the

end of the string, to the top of the treehouse.

Thread the loose end of the string up and

over the pulley aached to the hook that’s

ﬁxed at the top, then down again. Put Pepper

in the basket and pull her up to the top.

and the

Hoist

Bekijk gratis de handleiding van Thames & Kosmos Pepper Mint in the Great Treehouse Engineering Adventure, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.