1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it co

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1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it co
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1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it co
1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it continues to slow down ta this time at the same rate.
2.Figure p3.13 represents the total acceleration of a particle moving clockwise in a circle of radius 2.50 m at a certain time .at this instant,(a)find the radial acceleration,(b)the speed of the particle,and its tangential acceleration.
3.a river hsa a steady speed of 0.500m/s.A student swims upstream a distance of 1.00km and swims back to the 1.20 m/s in still water,how long does the trip take?compare this with the time the trip would take if the water were still.
4.the force (in newtons ) acting on a particle is Fx=(8.00x-16.0),where x is in meters.(a)make a plot of this force versus x from x=0 to x=3.00m.(b)from your graph,find the net work done by this force on the particle as it moves from x=0 to x=3.00m
最好是英文！中文也可以！
发了这么久，难道就没有人会解吗？

1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it co
A train in flat turn,the speed reduces 50km/h in 15 seconds from 90km/h,the radius of turn is 150 meters,tries extracts works as the speed is time the 50km/h acceleration.The supposition speed is continual (acceleration) changes by the similar speed.

一辆火车在水平转弯的时候，在15秒内速度由90km/h减小到50km/h，转弯半径是150米，试求出当速度是50km/h时的加速度。假设速度是连续的以同样的速率（加速度）变化的。

train is travelling at a speed of 15m/s and slows down uniformly to 5m/s whileA train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while travelling a distance of 50m.(1)Find its acceleration in this time .(2) It travel before co 1.A train slows down as it rounds a sharp horizontal turn,slowing from 90 km/h to 50 km/h in the 15s that it takes to round the bend .the radius of the curve is 150m .compute the acceleration at the moment the train speed reaches 50 km/h.assume it co 英语翻译Angry and defiant,the Simpson jurors stage a mutiny that slows down the already languidly paved trial. Do you often feel a little sleey after lunch?Well,that is normal.Your body naturally slows down.Wha Do you feel a little sleepy after lunch?Well,that's normal.Your body naturally slows down then.W When solid,liquid and gas are heated,the motion of particles ( )1.speeds up;2.slows down;3.has no changes 找错Your heart beats more slow and your brain slows down. Though your mind slows down,you will dream from time to time, 怎么翻译 一道连词的选择题Recycling wastes slows down the rate_____ we use up the Earth's natural resources.A.of what B.in which C.when D.at which Just a Quick Nap 只要打个盹儿Do you feel a little sleepy after lunch?Well,that’s normal.Your body naturally slows down then.What should you do about it?Don’t reach for a coffee!Instead,take a nap.It’s good to have a daily nap.First of all Do you often feel a little sleepy after lunch?Well,that's normal.Your body naturally slows down.What should you do about it?Don't drink coffee,take a nap,instead.There are advantages of a daily nap.First of all,you can remember things better and make 初一的英语完形填空【实在做不出来了,Do you often feel a little sleey after lunch?Well,that is normal.Your body naturally slows down.What should you do about it?Don't drink coffee,take a nap,instead.There are many advantages of adaily A person standing on a bus is thrown towards the rear of the bus as it starts to move forward,and to the frontf as it slows down.why?我需要的不是翻译不是翻译,最好用英语还有这是一到物理题 The train was moving.I heard my good friend's voice _ in the wind.A.came up B.died down C.got down He told me that a gentleman waiting for the train saw me fall down.saw me fall down修饰什么成分? 帮忙做一篇英语阅读,我错了很多北京海淀区2010一模We’ve all met with something that slows us down,for example,the bump（颠簸）in the road,the setback.You just have to keep in mind that a setback is only temporary and greater t 英语翻译Another habit which slows down the speed of reading is vocalization-sounding each word either orally or mentally as one reads. 英语翻译Another habit which slows down the speed of reading is vocalization-sounding each word either orally or mentally as one reads.