For example, the truck in Fig. 7-14 exerts a force F on the trailing load, whichas velocity v at some instant. The instantaneous power due to F is the rate atvhich F does work on the load at that instant and is given by Eqs. 7-47 and 7-48.Saying that this power is "the power of the truck" is often acceptable, but keep inmind what is meant: Power is the rate at which the applied force does work.A Checkpoint 3A block moves with uniform circular motion because a cord tied to the block is an-chored at the center of a circle. Is the power due to the force on the block from thecord positive, negative, or zero?

Answered: Image /qna-images/answer/e0bd35bf-33ed-4526-9f44-8b3daa808a36.jpg

A block moves with uniform circular motion because a cord tied to the block is an- chored at the center of a circle. Is the power due to the force on the block from the cord positive, negative, or zero?

A block moves with uniform circular motion because a cord tied to the block is an- chored at the center of a circle. Is the power due to the force on the block from the cord positive, negative, or zero?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.

Question

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For example, the truck in Fig. 7-14 exerts a force F on the trailing load, which
as velocity v at some instant. The instantaneous power due to F is the rate at
vhich F does work on the load at that instant and is given by Eqs. 7-47 and 7-48.
Saying that this power is "the power of the truck" is often acceptable, but keep in
mind what is meant: Power is the rate at which the applied force does work.
A Checkpoint 3
A block moves with uniform circular motion because a cord tied to the block is an-
chored at the center of a circle. Is the power due to the force on the block from the
cord positive, negative, or zero?

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