Assignment 8 Part I Rotational motion - PHY-123, section 01, Spring 2021 | WebAssign Port Authoritye Ladies Silk Touch Long Sleeve Polo | Uniform States of America The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 7.0 rev/s in 10.0 s. At this point, the person doing the laundry opens the lid, and turns off the washer. The tub slows to rest in 15.0 s. Through how many revolutions does the tub turn during this 25 s interval? Assume constant angular acceleration while it is starting and stopping. safety switch 25.53 Your response differs from the correct answer by more than 10%. Double check your calculations. rev Need Help? Read It
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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