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  1. (a) Decceleration of the vehicles = force/mass = 9000/(1500+3000) m/s^2 = 2 m/s^2 (b) Using: work done = change of kinetic energy 9000 x 100 = (1/2)(1500+3000)v^2 where v is the speed of the two vehicles just after collision solve for v gives v = 20 m/s (c) use conservation of...

  2. 1. Since impulsive force=change in momentum/impact time, the air bags and bumpers are...mass x velocity, this can reduce the mass of the car and hence reduce the momentum change and impulsive force acting on the pedestrian.

  3. ...linear velocity of the particle after collision, v = aw = (6sqrt3)u / 11 So, the impulsive action = mv - m(4ucos30*) = mu[(6sqrt3)/11 - 2sqrt3] = -(16sqrt3)mu / 11 2009-08-24 09...

    分類:科學及數學 > 數學 2009年08月24日

  4. ... change in momentum = mv time of contact is very small, eg 0.1s Thus, Impulsive force = mv/0.1 = 10mv, which will be a very large force that can lead you to death. ...

  5. ...集中困難(Attention-deficit)過度活躍(hyperactive或hyperkinetic)自制力弱( impulsive )而基於以上三種病徵出現的優勢,再把ADHD細分為以下三個分類:注意力...

    分類:社會科學 > 心理學 2010年10月07日

  6. ... ive ing ient active aggressive cooperative competitive descriptive exclusive impulsive native offensive alarming amazing annoying astonishing...

    分類:社會及文化 > 語言 2013年10月01日

  7. ...noticeable in school, but the inattentive daydreamer may be overlooked. The impulsive child who acts before thinking may be considered just a "...

    分類:社會科學 > 心理學 2007年11月13日

  8. ...叶えて!You yield to me. kanaete you yield to me 急かして! Impulsive date. sekashite impulsive date Let me know what you want, I would give...

  9. ...集中困難 (Attention-deficit) 活動量過多 (hyperactive 或 hyperkinetic) 自製力弱 ( impulsive ) 而基於以上三種病徵出現的優勢,再把ADHD細分為以下三個分類: 注意力...

  10. ...-deficit) 2.活動量過多(hyperactive或hyperkinetic) 3.自制力弱( impulsive ) 基於以上三種病徵出現的情況及主導,ADHD可再細分為以下三個分類...

    分類:健康 > 心理健康 2013年06月06日