A disk is rotating about a vertical axis of rotation with an initial angular velocity. There are two blocks sitting on the disk. A red block is located 0.5 m away from the axis of rotation. A blue block is located 1.5 m away from the axis of rotation. Which of the following is true? (There are two right answers) Group of answer choices The blue block has a higher angular velocity than the red block The red block has a higher angular velocity than the blue block The red block has the same angular velocity as the red block The blue block has a higher linear velocity than the red block The red block has a higher linear velocity than the blue block The blue block and the red block have the same linear velocity
Angular Momentum
The momentum of an object is given by multiplying its mass and velocity. Momentum is a property of any object that moves with mass. The only difference between angular momentum and linear momentum is that angular momentum deals with moving or spinning objects. A moving particle's linear momentum can be thought of as a measure of its linear motion. The force is proportional to the rate of change of linear momentum. Angular momentum is always directly proportional to mass. In rotational motion, the concept of angular momentum is often used. Since it is a conserved quantity—the total angular momentum of a closed system remains constant—it is a significant quantity in physics. To understand the concept of angular momentum first we need to understand a rigid body and its movement, a position vector that is used to specify the position of particles in space. A rigid body possesses motion it may be linear or rotational. Rotational motion plays important role in angular momentum.
Moment of a Force
The idea of moments is an important concept in physics. It arises from the fact that distance often plays an important part in the interaction of, or in determining the impact of forces on bodies. Moments are often described by their order [first, second, or higher order] based on the power to which the distance has to be raised to understand the phenomenon. Of particular note are the second-order moment of mass (Moment of Inertia) and moments of force.
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