作者MICKAAELan (米K)
看板RESIT
标题[问题] 一题物理
时间Thu May 22 15:23:57 2014
想请教大大一题物理，
因为看不懂题意，卡关好久，GOOGLE大神也只帮忙找到付费网站的解答@@
拜托各位大大了！
题目如下：
A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s.
At this time, the driver suddenly realizes that she must stop the car.
If it takes 0.200 s for the driver to apply the brakes,
what must be the magnitude of the constant acceleration of the car after
the brakes are applied so that the car will come to rest at the stop sign?
只能选择一个：
a. 2.08 m/s^2
b. 4.17 m/s^2
c. 3.42 m/s^2
d. 3.89 m/s^2
e. 2.89 m/s^2
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1F：推 hosanna0813:200=40*0.2+(at^2)/2 and 40=at 05/22 17:17
2F：推 miccebk:很好奇为什麽会去做英文叙述的物理题XD 05/22 17:19
3F：→ MICKAAELan:先谢谢大大帮忙解题！ 05/22 21:18
4F：→ MICKAAELan:今年重考学测推甄上了 物理先修课程但对我来说挺有难度 05/22 21:20
5F：→ MICKAAELan:以後有问题还烦请大大帮忙~ 05/22 21:21
6F：推 miccebk:恭喜! 我跟你一样也是今年正在等开学的人喔^^ 05/22 21:30