Which of the following is an example of a wedge? a. a fixed pulley b. a spiral stair case c. an ax d. a see-saw

C. an ax

wedges is anything that has a tip that tappers at the end. This means that one end is thicker and the other is thinner

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at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.