If a rotating body has an angular momentum of L and its moment of inertia is I,

Practice Questions

Q1
If a rotating body has an angular momentum of L and its moment of inertia is I, what is the angular velocity ω of the body?
  1. L/I
  2. I/L
  3. L^2/I
  4. I^2/L

Questions & Step-by-Step Solutions

If a rotating body has an angular momentum of L and its moment of inertia is I, what is the angular velocity ω of the body?
  • Step 1: Understand that angular momentum (L) is a measure of how much motion a rotating body has.
  • Step 2: Know that moment of inertia (I) is a measure of how difficult it is to change the rotation of the body.
  • Step 3: Remember the formula that relates angular momentum, moment of inertia, and angular velocity: L = Iω.
  • Step 4: To find angular velocity (ω), rearrange the formula to solve for ω: ω = L/I.
  • Step 5: Plug in the values of L (angular momentum) and I (moment of inertia) into the formula to calculate ω.
  • Angular Momentum – Angular momentum (L) is the product of a body's moment of inertia (I) and its angular velocity (ω), representing the rotational motion of the body.
  • Moment of Inertia – Moment of inertia (I) is a measure of an object's resistance to changes in its rotation, depending on the mass distribution relative to the axis of rotation.
  • Angular Velocity – Angular velocity (ω) is the rate of change of angular position of a rotating body, typically measured in radians per second.
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