Crowbar. A crowbar is used to pull a nail from a wood board. It is a lever,one of the simple machines. When the handle is pulled with a certain force (shorter arrow),the claw pulls the nail with a greater force (longer arrow). Here the ratio of the two forces is about 5 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 3386 px × 5113 px |
Model Release : | Non requis |
Restrictions : |
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