The Rotational Inertia of a Disk About Its Axis Is

question 53

Multiple Choice

The rotational inertia of a disk about its axis is 0.70 kg . m². When a 2.0 kg weight is added to its rim, 0.40 m from the axis, the rotational inertia becomes:

• A) 0.38 kg . m²
• B) 0.54 kg. m²
• C) 0.70 kg . m²
• D) 0.86 kg . m²
• E) 1.0 kg . m²

---

Definitions:

Torsional Strain

The resistance that occurs when molecules twist about their bonds, leading to a decrease in stability due to the repulsion between electrons in eclipsed conformations.

Newman Projection

is a way to visualize the spatial arrangement of bonds from the perspective of looking down the bond axis between two carbon atoms in a molecule.

C2-C3 Bond

A bond linking the second and third carbon atoms in a carbon chain, important in understanding the structure of organic molecules.

2,3-Dimethylbutane

A branched chain alkane with the formula C6H14, having methyl groups at the second and third carbon atoms of the butane chain.