A Rotating Solid Disk with a Diameter of 0

question 7

Essay

A rotating solid disk with a diameter of 0.25 m and a mass of 10 kg is used
to store 1 kJ of energy. What is its rotational speed in revolutions per minute?

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Definitions:

Electrons

Negatively charged particles within atoms, essential for conducting electricity in solid materials.

Iron

A metal element with the symbol Fe, known for its magnetic properties and widely used in construction, manufacturing, and biochemistry.

Isotope

Variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.

Electrons

subatomic particles with a negative electric charge, found in all atoms, and acting as the primary carrier of electricity in solids.