Angular momentum:

$\overline{)\stackrel{\mathbf{\rightharpoonup}}{\mathbf{L}}{\mathbf{=}}\stackrel{\mathbf{\rightharpoonup}}{\mathbf{r}}{\mathbf{\times}}\stackrel{\mathbf{\rightharpoonup}}{\mathbf{p}}}$

$\overline{)\begin{array}{rcl}\stackrel{\mathbf{\rightharpoonup}}{\mathbf{L}}& {\mathbf{=}}& \stackrel{\mathbf{\rightharpoonup}}{\mathbf{I}}\mathbf{\times}\stackrel{\mathbf{\rightharpoonup}}{\mathbf{\omega}}\end{array}}$

Moment of inertia:

$\overline{){\mathbf{I}}{\mathbf{=}}{{\mathbf{\int}}}_{{\mathbf{0}}}^{{\mathbf{m}}}{{\mathbf{r}}}^{{\mathbf{2}}}{\mathbf{d}}{\mathbf{m}}}$

**Part A**

From the first equation of angular momentum:

p is in kg•m/s and r is in m

Substituting:

Part A

Which of the following is the SI unit of angular momentum?

a) N • m/s

b) kg • m/s

c) kg • m^{2}/s^{2}

d) kg • m^{2}/s

Part B

An object has rotational inertia . The object, initially at rest, begins to rotate with a constant angular acceleration of magnitude . What is the magnitude of the angular momentum of the object after time ?

Express your answer in terms of, , and.

=

Part C

A rigid, uniform bar with mass and length rotates aboutthe axis passing through the midpoint of the bar perpendicular tothe bar. The linear speed of the end points of the bar is. What is themagnitude of the angular momentum ofthe bar?

Express your answer in terms of, , , andappropriate constants.

=

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Angular Momentum concept. You can view video lessons to learn Intro to Angular Momentum. Or if you need more Intro to Angular Momentum practice, you can also practice Intro to Angular Momentum practice problems.

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Based on our data, we think this problem is relevant for Professor Yildirim's class at ASU.