Calculate the moment of inertia for a solid cylinder with a mass of 100g and a radius of 4.0 cm

Solution here,

mass of cylinder(m)=100 g

radius of cylinder(r)= 4 cm

momoent of inertia(I)=?

we have,

I=mr^2=100×4^2=1600 g/cm^2

The moment of inertia for the cylinder is 1600gcm².

Explanation:

In a cylinder with mass m, in g, and radius r, in cm, the moment of inertia is given, in gcm² by the following formula:

In this problem, we have that:

solid cylinder with a mass of 100g and a radius of 4.0 cm. This means that .

So

The moment of inertia for the cylinder is 1600gcm².

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

i don't understand. explain it clearly