Question

求翻译（work and power）不要机翻，在线等，急急急急急急急！！！！！

work and power
in everyday life work has many different meanings, but to scientists it is something very precise.
work is done when a force causes an object to move or prevents it from moving. The amount of work done can be calculated using the following equation:
work done = force *distance moved in the direction of the force
the above equation can be explained in words. that is to say , work done equals force times (or multiplied by) distance moved in the direction of the force.
if a force of 1 n (newton) causes an object to move 1 meter, then 1 j (joule) of work has been done.
for example, in order to raise the weights above his head, this athlete must apply a force of 2000 newtons, which causes them to move up to the height of 2 meters. in doing so he is doing work.
then , the work done by the athlete is : the force applied by him times the distance moved. if can be calculated in this way:
work done=2000n*2m=4000j
so, the answer is 4000 joules.
in another example, in order to cut the lawn, this lady must push her lawnmower. a force, 80 newthons, is needed to make the lawnmower move. There is a force , 50 newtons, from the engine acting to push the lawnmower forward. the lady has to apply more so that the lawnmower can move along a straight line for a distance of 40 meters. as she does so, she is doing work.
first, we should work out the force which the lady applies to make the lawnmower move on. since the force needed to move the lawnmower is 80 n and the engine has a force of 50 n , the lady's force can be obtained by doing the following calculation:80 n-50n =30n.it can be explained in words:80 newtons minus 50 newtons equals 30 newtons. so, the force applied by the lady is 30n.
then we can calculate the work done by the lady:
work done =30n *40j =1200j
thus, the work done by the lady is 1200 joules.
power is a measure of how rapidly work is being done. it is measured in watts（w). if a person or a machine is doing 1j of work each second, the power rating is 1 w (watt).
power=(work done)/(time taken)
the equaltin can be explained in words:power equals work done divided by time taken.
now, let's look at the athlete. what is the power of the athlete? if it takes the athlete 0.5 second to lift the weights obove his head, the power of the althlete above is:
power=(4000j/0.5s)=80000w or 8kw
thus, the answer is 8000w or 8kw
now , can you tell the power of the lady above if she uses 200 seconds to finish cutting the lawn for a distance of 40 meters?

Answer 1

工作和日常生活powerin工作有许多不同的含义,但科学家是非常精确的。工作完成时,力使物体移动或阻止它移动。完成的工作量可以计算使用以下方程:工作=力*移动距离的方向forcethe以上方程可以用语言来解释。也就是说,工作等于力量乘以(或乘以)在力的方向移动的距离。如果1 n的力(牛顿)使一个物体移动1米,然后1 j(焦耳)的工作已经完成。例如,为了提高权重头上,这个运动员必须申请2000牛顿的力,导致他们对2米的高度。这样做他所做的工作。然后,运动员完成的工作是:应用武力他移动的距离。如果可以这样计算:工作= 2000 n * 2 = 2000 jso,答案是4000焦耳。在另一个例子,为了减少草坪,这位女士必须把她推割草机。力,需要80 newthons,使割草机。有一种力量,50牛顿,从发动机向前推割草机。女士已经申请,以便割草机可以沿着一条直线的距离40米。当她这样做时,她正在做的工作。首先,我们应该找出适用于夫人使割草机的力量继续前进。自80年力量需要割草机和引擎的力量50 n,夫人的力量可以通过以下计算:80 n-50n = 30 n。它可以解释词:80牛顿减去50牛顿等于30牛顿。所以,小姐是30 n所施加的力。然后我们可以计算工作的女士:工作= 30 n * 40 = 1200 jthus,做的工作女人是1200焦耳。权力是一个快速的工作被做。以瓦(w)。如果一个人或机器每秒1 j工作,额定功率为1 w(瓦特)。功率=(工作)/(时间)equaltin可以用文字解释:权力等于工作除以时间。现在,让我们看一下运动员。运动员的力量是什么?如果需要运动员0.5秒提升权重obove头上,上面的运动员的力量是:权力=(4000 j / 0.5 s)= 80000 w或8 kwthus,答案是8000 w或8 kwnow,上面你能告诉这位女士的力量如果她用200秒完成切割草坪为40米的距离吗?