The Way Things Work Inclined Planes
Dropping boulders off a tower makes gravel for the Mammoth Island roads, but lifting the boulders up to the top of the tower is difficult and dangerous. A young Mammoth Islander suggests that rolling boulders up a ramp would be easier than hauling them up a tower.
| Corporate Author: | Millimages S.A., Schlessinger Media., Pearson Broadband. |
|---|---|
| Other Authors: | Zamora, Diego., Macaulay, David. |
| Format: | Videos DVD |
| Language: | English Spanish |
| Published: |
Wynnewood, PA :
Schlessinger Media,
[2003], c2002.
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| Subjects: |