All Flashcards

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.

How do you calculate angular momentum for a rigid object rotating about a fixed axis?

Use the formula: $L = I\omega$ , where L is angular momentum, I is moment of inertia, and ω is angular velocity.

How do you calculate angular momentum about a point for a particle?

Use the cross product: $\vec{L} = \vec{r} \times \vec{p}$ , where $\vec{L}$ is angular momentum, $\vec{r}$ is the position vector, and $\vec{p}$ is linear momentum.

How do you determine angular impulse graphically?

Calculate the area under a torque vs. time graph.

How do you calculate the change in angular momentum?

Subtract the initial angular momentum from the final angular momentum: $\Delta L = L - L_0$ .

How to find net torque from an angular momentum vs time graph?

Find the slope of the angular momentum vs. time graph.

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 $\vec{L}$