UC知道物理问题english
来源：百度知道 编辑：UC知道 时间：2024/06/08 04:18:01
A car of werght 12000N is driven at constant speed up a hill which rises 1m for every 6m along the slope.If the car travels 600m along the slope,calculate:
(i) the change in potential energy of the car.
(ii) the mass of fuel which should be used if the energy available from 1kg of fuel is 4*10^7J.
(iii) Explain why your answer to (ii) would probably be different from the value found by experiment.
拜托 翻译成中文~~ 并算一下~~
(i) the change in potential energy of the car.
(ii) the mass of fuel which should be used if the energy available from 1kg of fuel is 4*10^7J.
(iii) Explain why your answer to (ii) would probably be different from the value found by experiment.
拜托 翻译成中文~~ 并算一下~~
一辆重12000N的汽车匀速行驶在一个斜度i=1：6的斜坡上。假设这辆车沿斜坡行驶了600米，计算：
(1)汽车的势能变化；
(2)消耗热值为4*10^7J/kg的燃料质量；
(3)解释为什么你在(2)中的答案可能与实验中得到的值不同。
解：(1)E(p)=Gh=12000N*600m*1/6=1.2*10^6J
(2)m=E(P)/q=1.2*10^6J/(4*10^7J/kg)=0.03kg
(3)UNKNOWN
不知道对不对，感觉奇怪（第二问）