![](/nationalgeographic/adventurer_april_2019/more_is_better/245176/igloo.480_0_1.jpg)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245177/penguin.128_0_1.png)
Aniglooisahousemadeoficeor snow.
ApplytheScience
Thesepenguinsarebuildinganigloo,buttheyneedmoreice.
PollyPenguinneedstodeliverthebucketoficetoPeterPenguin.
Thebucketoficeisprettyheavy.Pollyhasanideaforhowtoliftit
toPeter.She’sgoingtotrytouseapulley....Youcantrythis, too!
![](/nationalgeographic/adventurer_april_2019/more_is_better/245175/iceblocks_intro.240_0_1.png)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245178/setup_1.1440_0_1.jpg)
Peter Penguin
table
chair
Polly Penguin
chair
bucketof ice
rope
abroom handle
![](/nationalgeographic/adventurer_april_2019/more_is_better/245179/setup_2.1440_0_1.jpg)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245169/iceblocks_1.128_0_1.png)
1
Peterlaysthebroomhandlebetweenthetwochairs.Pollytiesoneendoftheropetotheicebucket.Sheloopstheotherendoftheropearoundthebroomhandle.She’smadeasimplepulley.Shegivestheropeapull,butit’snotenoughtoliftthe bucket.
![](/nationalgeographic/adventurer_april_2019/more_is_better/245180/setup_3.1440_0_1.jpg)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245170/iceblocks_2_1.128_0_1.png)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245171/iceblocks_2_2.128_0_1.png)
2
Peterisstillwaitingfortheice.So,Pollytriesanotherapproach.Thistime,shetiesoneendoftheropetothebroomhandle.Sheloopstheropethroughthehandleoftheicebucketandaroundthebroomhandle.Now,Pollyhasmadeacompoundpulley.She’sabletoliftthebucketallthewaytothe top.
![](/nationalgeographic/adventurer_april_2019/more_is_better/245181/setup_4.1440_0_1.jpg)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245173/iceblocks_3_2.128_0_1.png)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245172/iceblocks_3_1.128_0_1.png)
![](/nationalgeographic/adventurer_april_2019/more_is_better/245174/iceblocks_3_3.128_0_1.png)
3
Success!Peterhastheice,and thepenguinscancontinuetoworkontheirigloo together.