Which of the following is an example of kinetic energy?
A. a boy resting on a park bench
B. a book sitting on a shelf
C. a rubber band stretched as far as it can go
D. a swing moving back and forth

D

Explanation:

Kinetic energy means the energy of motion. Answer choices A, B, and C are all examples of things that are not moving or have potential energy, meaning that it could be converted to kinetic energy but is not right now. However, a swing moving back and forth is motion, meaning that it has kinetic energy. Hope this helps!

D) A swing moving back and forth

Explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.