/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q4Q Figure 10-22鈥塨聽聽is a graph o... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 10: Q4Q (page 286)

Figure 10-22鈥塨is a graph of the angular position of the rotating disk of Fig.10-22鈥塧. Is the angular velocity of the disk positive, negative, or zero at (a)t=1s, (b)t=2s, and (c)t=3s? (d) Is the angular acceleration positive or negative?

Short Answer

Expert verified
  1. Angular velocities of the disk, at pointt=1鈥塻is positive.
  2. Angular velocities of the disk, at pointt=2鈥塻is zero.
  3. Angular velocities of the disk, at pointt=3sis negative.
  4. The angular acceleration is negative.

Step by step solution

01

Step 1: Given data

Graph of angular position vs time.

02

Determining the concept

Find the sign of the slope of the graph which represents the sign of angular velocity. Conclude about the angular acceleration from the nature of the graph.

03

(a) Determining if the angular velocity of the disk is positive, negative, or zero at  t= 1 s

The given graph is an angular position vs time graph, so the slope of the graph is angular velocity.

At point t=1, it is positive because the slope is positive.

04

(b) Determining if the angular velocity of the disk is positive, negative, or zero at t= 2 s 

At point t=2, it is zero because the slope is zero.

05

(c) Determining if the angular velocity of the disk is positive, negative, or zero at t= 3 s

At point t=3, it is negative, because slope is negative.

06

(d) Determining if the angular acceleration is positive or negative

The given fact that the original function is concave down, its second derivative must be negative.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The angular speed of an automobile engine is increased at a constant rate from 1200revmin to3000revmin in 12s. (a) What is its angular acceleration in revolutions per minute-squared? (b) How many revolutions does the engine make during this12s interval?

Figure 10 - 26shows a uniform metal plate that had been square before 25 %of it was snipped off. Three lettered points are indicated. Rank them according to the rotational inertia of the plate around a perpendicular axis through them, greatest first.

An object rotates about a fixed axis, and the angular position of a reference line on the object is given by,胃=0.40e2twhere 胃is in radians and tis in seconds. Consider a point on the object that is 4.0cmfrom the axis of rotation. Att=0鈥�s , what are the magnitudes of the point鈥檚

(a) tangential component of acceleration and

(b) radial component of acceleration?

A seed is on a turntable rotating at13revmin,6.0cmfrom the rotation axis. What are (a) the seed鈥檚 acceleration and (b) the least coefficient of static friction to avoid slippage? (c) If the turntable had undergone constant angular acceleration from rest in0.25s, what is the least coefficient to avoid slippage?

Figure 10-25ais an overhead view of a horizontal bar that can pivot; two horizontal forces act on the bar, but it is stationary. If the angle between the bar and F鈫�2is now decreased from 90掳and the bar is still not to turn, should F鈫�2be made larger, made smaller, or left the same?
See all solutions

Recommended explanations on Physics Textbooks

Solid State Physics

Read Explanation

Wave Optics

Read Explanation

Measurements

Read Explanation

Thermodynamics

Read Explanation

Circular Motion and Gravitation

Read Explanation

Dynamics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.