A majorette takes two batons and fastens them together in the middle at right angles to make an "x" shape.Each baton was 0.90 m long and each ball on the end is 0.20 kg.(Ignore the mass of the rods. )What is the moment of inertia if the arrangement is spun around an axis formed by one of the batons? A) 0.081 kg·m² B) 0.064 kg·m² C) 0.19 kg·m² D) 0.32 kg·m²

Question

Quizplus · Accepted Answer

The moment of inertia of a point mass about an axis perpendicular to the mass and passing through the mass is mr^2. The moment of inertia of the two batons about the axis formed by one of the batons is:I = 2 * (1/2 * 0.90 m)^2 * 0.20 kg = 0.081 kg·m^2

A Majorette Takes Two Batons and Fastens Them Together in the Middle