For a solid disk of mass M and radius R, what is the moment of inertia about an
Practice Questions
Q1
For a solid disk of mass M and radius R, what is the moment of inertia about an axis perpendicular to the disk and passing through its center?
1/2 MR^2
1/4 MR^2
MR^2
3/4 MR^2
Questions & Step-by-Step Solutions
For a solid disk of mass M and radius R, what is the moment of inertia about an axis perpendicular to the disk and passing through its center?
Step 1: Understand what moment of inertia is. It is a measure of how difficult it is to change the rotation of an object.
Step 2: Identify the shape of the object. In this case, it is a solid disk.
Step 3: Know the parameters involved. The mass of the disk is M and the radius is R.
Step 4: Recall the formula for the moment of inertia of a solid disk about an axis through its center. The formula is I = 1/2 MR^2.
Step 5: Substitute the values of M and R into the formula if needed, but the formula itself gives you the moment of inertia directly.
Moment of Inertia – The moment of inertia is a measure of an object's resistance to rotational motion about a given axis.
Solid Disk Properties – Understanding the geometric and mass distribution properties of a solid disk is essential for calculating its moment of inertia.
Axis of Rotation – The axis about which the moment of inertia is calculated significantly affects the value, as it depends on the distribution of mass relative to that axis.