All Flashcards

How do you calculate angular momentum for a rigid object?

Identify the moment of inertia (I). 2. Determine the angular velocity ( $\omega$ ). 3. Use the formula: $L = I\omega$ .

How do you calculate angular momentum for a point object?

Determine the distance (r) from the reference point. 2. Find the mass (m) and velocity (v) of the object. 3. Measure the angle ( $\theta$ ) between r and v. 4. Use the formula: $L = rmv \sin \theta$ .

How is angular impulse calculated?

Determine the torque ( $\tau$ ) applied. 2. Measure the time interval ( $\Delta t$ ) over which the torque is applied. 3. Use the formula: Angular Impulse = $\tau \Delta t$ .

How do you calculate the change in angular momentum?

Determine the final angular momentum ( $L_f$ ). 2. Determine the initial angular momentum ( $L_i$ ). 3. Use the formula: $\Delta L = L_f - L_i$ .

How do you determine angular impulse from a torque vs. time graph?

Obtain a torque vs. time graph. 2. Calculate the area under the curve of the graph. 3. The area represents the angular impulse.

In the right-hand rule diagram for angular momentum, what do the fingers, curl, and thumb represent?

Fingers: direction of $\vec{r}$ , Curl: direction of $\vec{p}$ , Thumb: direction of $\vec{L}$

What is the effect of applying a torque to an object?

It causes a change in angular momentum.

What happens if the moment of inertia of a spinning object decreases?

If angular momentum is conserved, the angular velocity increases.

What is the effect of a net torque on angular acceleration?

A net torque causes angular acceleration ( $\tau_{net} = I\alpha$ ).

What happens when angular impulse is applied to an object?

The angular momentum of the object changes.

What is the effect of increasing the distance (r) from the reference point on angular momentum?

The angular momentum increases, assuming other factors remain constant.