Question

which type of energy is rotating fan blades?
mechanical energy
potential energy
gravitational energy
chemical energy
question 4
which type of energy is the energy of motion?
kinetic
static
stored
potential

Explanation:

• For the first question: Rotating fan blades are in motion. Mechanical energy is the sum of kinetic and potential energy. Since the blades are moving (kinetic energy which is part of mechanical energy), it's mechanical energy. Potential energy is stored energy (not relevant here as blades are moving). Gravitational energy is a type of potential energy (due to height). Chemical energy is stored in chemical bonds (not relevant here).
• For the second question: By definition, kinetic energy is the energy of motion. Static is not a form of energy in this context. Stored energy is more related to potential energy. Potential energy is stored (opposite of energy of motion).

Answer:

• First question: mechanical energy
• Second question: kinetic