Question

If each of the three rotor helicopter blades is 3.75 mm long and has a mass of 135 kgkg, calculate the moment of inertia of the three rotor blades about the axis of rotation.

Answer 1

`1.90*10^(3)kg.m^2`

Step-by-step explanation:

The computation of the moment of inertia of the three rotor blades is shown below:

Given that

Three rotor helicopter blades = 3.75 mm long

Mass = 135 kg

Based on the above information

As we know that

Axis at the end is

`I_1 = (1)/(3) ML^2`

Now the total moment of inertia is

`I = 3I_i\\\\= ML^2\\\\= (135 kg) (3.75m)^2\\\\= 1.90*10^(3)kg.m^2`

Hence, the moment of inertia of the three rotor blades is
`1.90*10^(3)kg.m^2`

We simply applied the above formula and the same is to be considered