Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Add question

You must login to ask question .

Login

Register Now

Lorem ipsum dolor sit amet, consectetur adipiscing elit.Morbi adipiscing gravdio, sit amet suscipit risus ultrices eu.Fusce viverra neque at purus laoreet consequa.Vivamus vulputate posuere nisl quis consequat.

Torque and Angular Acceleration

Learning Goal: To understand and apply the formula τ =Iɑ to rigid objects rotating about a fixed axis.

To find the acceleration ɑ of a particle of mass m, we use Newton’s second law: , where  is the net force acting on the particle.

To find the angular acceleration ɑ of a rigid object rotating about a fixed axis, we can use a similar formula: τnet = Iɑ, where τnet =Στ is the net torque acting on the object and I is its moment of inertia.

In this problem, you will practice applying this formula to several situations involving angular acceleration. In all of these situations, two objects of masses m1 and m2 are attached to a seesaw. The seesaw is made of a bar that has length l and is pivoted so that it is free to rotate in the vertical plane without friction.Assume that the pivot is attached tot he center of the bar.

You are to find the angular acceleration of the seesaw when it is set in motion from the horizontal position. In all cases, assume that m1>m2.

A) Assume that the mass of the swing bar, as shown in the figure, is negligible.  

Find the magnitude of the angular acceleration ɑ of the seesaw.

=>

α = 

B) In what direction will the seesaw rotate, and what will the sign of the angular acceleration be?

=> The rotation is in the counterclockwise direction and the angular acceleration is positive.

C) Now consider a similar situation, except that now the swing bar itself has mass mbar.

Find the magnitude of the angular acceleration α of the seesaw.

=>

α=

D) In what direction will the seesaw rotate and what will the sign of the angular acceleration be?

=> The rotation is in the counterclockwise direction and the angular acceleration is positive.

About Vita

Comments ( 7 )

  1. Hello! I know this is kinda off topic nevertheless I’d figured I’d ask. Would you be interested in trading links or maybe guest writing a blog post or vice-versa? My blog discusses a lot of the same topics as yours and I feel we could greatly benefit from each other. If you happen to be interested feel free to send me an e-mail. I look forward to hearing from you! Awesome blog by the way!
  2. Hey I know this is off topic but I was wondering if you knew
    of any widgets I could add to my blog that automatically tweet my newest
    twitter updates. I’ve been looking for a plug-in like this for
    quite some time and was hoping maybe you would have some experience with something like this.
    Please let me know if you run into anything. I truly enjoy reading your blog and
    I look forward to your new updates.
  3. I have been exploring for a little for any high quality articles or weblog
    posts on this kind of area . Exploring in Yahoo I at last stumbled
    upon this website. Reading this information So i’m glad to express that I have an incredibly excellent uncanny feeling I came upon just what I needed.
    I most unquestionably will make certain to do not put out of your mind this website and
    give it a glance on a relentless basis.
  4. スーパーコピー、スーパーコピーブランド(N級品)激安通販専門店世界一流ブランドコピー 財布、スーパーコピー 商品、激安ブランドコピー 。 ヴィトンコピー 、 ミョウミョウコピー 、シャネルコピー 、エル メスコピー 品格安通販。商品は全て最高な材料 と優れた技術で造られて、正規と比べて、品質が無差別です!人気ブランド..
    エルバーキンコピーエルメスバーキン30コピーエルメス ボリード47,エルメス バッグ 名前,エルメス ネクタイ ピンク エルメス クラッチバッグ,エルメス バッグ コピー,エルメス バーキン コピー エルメス 財布 ダミエ オークション,エルメス ヨーロッパ,エルメス エールライン エルメス クラッチ激安通販、高い品質、送料無料。バーキン25コピー、バーキン30コピー、バーキン35コピー、バーキン40コピーなど世界中有名なブランドレプリカを格安で通販しております。N級品スーパーコピーブランドは ブランドスーパーコピー超N品エルメスバッグ,エルメス バーキン25 , バーキン30.バーキン35.バーキン40. エルメス(HERMES) ケリー http://www.bagkakaku.com/chanel_bag.html
  5. Gaga Milanoスーパーコピー時計販売、 はガガミラノコピー時計販売・通販店です . 0.316883211 レプリカGaga Milanoのマーカー: ローズ ゴールドのアプライド インデックス ガガミラノOTコピー、SS品、N品、価格、品質の保証,2015人気偽物,歓迎光臨楽天★送料無料(日本全国) . レプリカガガミラノ時計Blog: http://www.wtobrand.com/gc3.html
  6. ブライトリングクロノマチックコピー時計のそれから彼女は、黒1と同じことを確認しました 0.266876407 . 0.163217187 ブライトリングクロノマチックスーパーコピー時計のクリスマスのために彼は割れた顔をして時計を開きます . 2015ブライトリングクロノマチックスーパーコピーを製造販売している最高級ブライトリングクロノマチックコピーブライトリングクロノマチック時計屋であり、価格で3レプリカを通販していますので、是非ご拝見頂きます様お願い申し上げます。 http://www.ooobag.com/watch/chanel/38/86a035fcc76b1b1d.html
  7. part E

    Express your answer in terms of some or all of the quantities m1, m2, mbar, l, as well as the acceleration due to gravity g. Enter the absolute value function as abs(). For instance, enter abs(x*y) for |xy|.

    alpha= g(6m1−12m2−3mbar)/(m1+4m2+mbar)⋅2l

Leave a reply