1 The 1000 newton weight of a pile driver falls freely from rest; it drops 25 meters,strikes a steel beam,and drives it 3 centimeters into the ground.The speed of the weight just before hitting the beam is ,in meters per second,approximately?2 The op

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1 The 1000 newton weight of a pile driver falls freely from rest; it drops 25 meters,strikes a steel beam,and drives it 3 centimeters into the ground.The speed of the weight just before hitting the beam is ,in meters per second,approximately?2 The op
1
The 1000 newton weight of a pile driver falls freely from rest; it drops 25 meters,strikes a steel beam,and drives it 3 centimeters into the ground.The speed of the weight just before hitting the beam is ,in meters per second,approximately?
2
The operator of a boat wishes to cross a 5 kilometer-wide river that is flowing the the east at 10 meters persecond.He wishes to reach the exact point on the opposite shore 15 minutes after starting.At what speed and in what direction should the boat travel?
11.2m/s at 63.4 W of N

1 The 1000 newton weight of a pile driver falls freely from rest; it drops 25 meters,strikes a steel beam,and drives it 3 centimeters into the ground.The speed of the weight just before hitting the beam is ,in meters per second,approximately?2 The op
BARRON上的题吧 1能量守恒,1/2mvv=mgh ,即1/2*100kg*v*v=100kg*g*25m ,v为根号下500,所以是22 2意思是要河的正对面,即水平方向没有位移.合速度是垂直于岸的.合速度为 5000m/900s=5.5,船速度=根号下5.5*5.5+10*10 约为11.4,然后角度也算的出了.

香港哪里有卖nixon the newton What is Newton'theory about the universe? Nixon the Newton这手表怎么样 Newton's Second LawDid anybody konw how to prove the Newton's Second Law? newton,the famous English scientist,was such a man 翻译 1 The 1000 newton weight of a pile driver falls freely from rest; it drops 25 meters,strikes a steel beam,and drives it 3 centimeters into the ground.The speed of the weight just before hitting the beam is ,in meters per second,approximately?2 The op the leading english poet of newton 's time.Alexander Pope,honored the scientist with these word:X翻译、.重点不懂,the leading english poet of newton 's time He is the Newton of this age.请问怎么翻?还有~为什么用the~ newton second law (the history and the procedure)should be in english 英语用连词填空1.The current,_________ is very rapid,makes the river dangerous.2.Beethoven ,_______ pieces are we have played,is a famous composer.3.Newton was one of the greastest men _______ ever lived.3.Is there anyone else _______ we shoul a 3-Newton 源题:The resultant of a 3-newton force and a 4-newton force that act on an object in opposite directions to each other si,in newtons,....... 翻译!the theory modified Newton's work on space and time in key areas Newton was the greatest scientist of his time.of his time 是什么成份? 请帮我翻一下这段英语We now challenge your intuitive understanding of Newton's laws of motion by considering several perturbations of the motion of an orbiting object. Modify your planet program to simulate the effects of the perturbations GMAT的两道题目(需要逻辑分析)1.Historian:We can learn about the medical history of individuals through chemical analysis of their hair.It is likely,for example,that Isaac Newton’s psychological problems were due to mercury poisoning; trac on the properties of 原话是Newton published his later work on the properties of light-Opticks-in English 4 OPhir st.Newton Auckland NEW ZEALAND 请帮忙翻译此地址.急 1 lsaac Newton的生日