Jack-in-the-box and a spring. The potential energy of a compressed spring is converted to the kinetic energy (motion) of an uncoiling spring as the box is opened,causing the clown to leap out | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 3066 px × 4103 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |