A uniform rod of mass 3.05x10-2 kg and length 0.410 m rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small rings, each with mass 0.210 kg, are mounted so that they can slide along the rod. They are initially held by catches at positions a distance 5.10×10-2 m on each side from the center of the rod, and the system is rotating at an angular velocity 31.0 rev/min. Without otherwise changing the system, the catches are released, and the rings slide outward along the rod and fly off at the ends. ▼ ▼ Part A What is the angular speed f the system at the instant when the rings reach the ends of the rod? ||| ΑΣΦ ? Wsystem = rev/min Submit Request Answer Part B What is the angular speed 15] ΑΣΦ wrod = Submit the rod after the rings leave it? ? Request Answer rev/min
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.
10.88
![Problem 10.88
A uniform rod of mass 3.05×10-2 kg and length 0.410 m rotates in a horizontal
plane about a fixed axis through its center and perpendicular to the rod. Two small
rings, each with mass 0.210 kg, are mounted so that they can slide along the rod.
They are initially held by catches at positions a distance 5.10×10-2 m on each side
from the center of the rod, and the system is rotating at an angular velocity 31.0
rev/min. Without otherwise changing the system, the catches are released, and
the rings slide outward along the rod and fly off at the ends.
Part A
What is the angular speed of the system at the instant when the rings reach the ends of the rod?
IVL] ΑΣΦ
^
?
Wsystem =
rev/min
Submit
Request Answer
Part B
What is the angular speed of the rod after the rings leave it?
Π|| ΑΣΦ 4
Wrod =
Submit
Request Answer
rev/min](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fddf14729-dbf2-4574-b793-bebd8df9c378%2F4d90371f-284c-4239-b5e5-bde94583b043%2Fyj5r5lb_processed.png&w=3840&q=75)
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