Lv 1205 points

隱夜

最佳解答80%
解答5
問題5
  • [physics]How to calculate out the velocity and magnitude?

    A car starts from rest and accelerates with magnitude a=2 m/s^2 up a mountainside road. After traveling for a distance l=100m and a time t=t{l}, the road abruptly ends at a cliff, which is at a height h=60m above the starting height of the car. The car drives off the cliff and free falls to the ground below, returning to it's starting height. The car's mass is 2000 kg. Neglect air resistance.

    a)Find the time t{l} at which the car leaves the road.

    b)Calculate the car's velocity vector when it leaves the cliff.

    c)Calculate the car's velocity vector when it hits the ground.

    e)How far from the bottom of the cliff does the car hit the ground.

    p.s my graph to the problem looks like this

    http://i.imgur.com/eeCE0.png

    for problem a) I got

    x=x0+v0t+1/2at^2

    100=1/2at^2

    t=10 m/s

    3 個解答Physics8 年前
  • Luts DOD Leeke家的比較

    研究好久,決定要哪隻.其中這

    luts 的moon

    DOD 的Ducan

    Leeke world 的Hero

    最讓我考慮

    可以幫我比較一下嘛?

    指...

    那家衣服跟假髮比較好買到?

    那家的膚質比較好,比較不會變質?

    ...etc

    1 個解答嗜好與手工藝1 0 年前
  • 美國版 GE online (10點)

    美國版 GE online

    1.誰可以給我官網?

    2.那需要付費嘛?還是免費的?

    3.請給個載點

    2 個解答電玩與網路遊戲1 0 年前