Question #115940

In the figure below, two particles with a mass m1= 0.83kg are fastened to each other and to a rotation axis at O by two thin rods each with length d=10 cm and mass=1.4 kg. The combination rotated around the rotation axis with angular speed w= 0.33 rad/s. Measures by O, what is the combination’s rotational inertia?

Expert's answer

Since no figure or link for the figure was attached, assume that the situation looks like this:

Luckily, the moment of inertia is an additive quantity, which helps us to calculate the total rotational inertia. For the rod of mass 2*m* and total length 2*d* the moment of inertia will be

The moment of inertia of the two masses *m*_{1}:

The total moment of inertia:

Also, we can calculate the angular momentum of the system:

Learn more about our help with Assignments: MechanicsRelativity

## Comments

## Leave a comment