Different types of energy: kinetic vs potential vs

1. The problem statement, all variables and given/known data

What type of energy does a blackboard eraser have when I hold it steady three feet about the ground?

a. potential energy
b. kinetic energy
c. electrical energy
d. spring elastic energy

I think it is kinetic energy. But I am confused on the differences of types of energies.

http://ift.tt/1gv0yHE

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