Steps:

A. Electrical energy is stored in the phone.

B. The electric energy becomes elastic energy as a rubber band is used to catapult the phone forward.

C. Elastic energy becomes chemical energy as it hits the car containing a battery.

D. As the car starts to roll down the inclined plane the chemical energy from the battery powered car becomes mechanical energy

E. The car hits a book causing it to fall on a lever transforming the mechanical energy in to gravitational energy.

F. The gravitational energy transforms into mechanical energy as the lever causes the wheels & axles (penny board) to start rolling forward.

G. As the penny board meets a set of books the mechanical energy becomes gravitational energy causing the books to fall.

H. The books hit the plane causing the ball to roll away transforming the gravitational energy into mechanical energy.

I. Lastly the mechanic energy from the ball rolling away becomes gravitational energy as it causes the carton to fall pouring water into the cup.

Energy Transfers:

1. Electrical Energy^A -> Elastic Energy^B
2. Elastic Energy^B -> Chemical Energy^C
3. Chemical Energy^C -> Mechanical Energy^D
4. Mechanical Energy^D -> Gravitational Energy^E
5. Gravitational Energy^E -> Mechanical Energy^F
6. Mechanical Energy^F -> Gravitational Energy^G
7. Gravitational Energy^G -> Mechanical Energy^H
8. Mechanical Energy^H -> Gravitational Energy^I

(Superscripts signify which step from above is producing the form of energy)

Types of Energy:

1. Electrical Energy
2. Elastic Energy
3. Chemical Energy
4. Mechanical Energy
5. Gravitational Energy

Simple Machines:

1. Inclined plane
2. Lever
3. Wheel & Axle

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