首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
如图12-Z-13所示,斜面长5m、高1m,工人用沿斜面方向大小为400N的力把重1600N的木箱匀速推到车上,推力对木箱做的功是 J,斜面的机械效率是 .
查看本题答案
包含此试题的试卷
教案备课库《自我综合评价(六)》真题及答案
点击查看
你可能感兴趣的试题
如图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的集装箱匀速推到车上推力做的功为J
如图所示斜面长5m高1m工人用沿斜面方向400N.的力把重1600N.的集装箱匀速推到车上推力对集装
如图所示斜面长6m高1m工人用500N的力沿斜面把重2400N的箱子匀速推到车上推力对箱子做的功是J
如图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的木箱匀速推到车上推力对木箱做的功
如图4所示斜面高为lm长为3m工人用400N沿斜面方向的力将重为840N.的箱子推到车上在这过程中推
如图14所示斜面长5m高1.6m用400N的拉力将重为1000N的物体沿斜面匀速向上从底端拉到顶端求
如图-1所示工人沿斜面把一箱货物从底端拉进车厢货物移动的距离s与时间t的关系如图-2所示在此期间工人
如图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的木箱匀速推到车上推力对木箱做的功
如图5所示斜面长6m高1m工人用500N的力沿斜面把重2400N的箱子匀速推到车上推力对箱子做的功是
如图所示斜面高为1m长为3m工人用400N沿斜面方向的力将重为840N的箱子推到车上在这过程中推力做
如图所示斜面长5m高1m工人用沿斜面方向400N.的力把重1600N.的集装箱匀速推到车上推力对集装
如图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的集装箱匀速推到车上推力对集装箱做
10·攀枝花如下图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的木箱匀速推到车上推
如图7所示斜面长1m高0.4m用大小为5N沿斜面向上的拉力F.将重10N的铁块从底端匀速拉到顶端斜面
如图17所示斜面长5m高3m小明用绳子沿斜面将重为300N的木块由斜面底端匀速拉到顶端拉力大小为24
如图所示斜面高为1m长为3m工人用400N沿斜面方向的力将重为840N的箱子推到车上在这过程中工人做
如图所示斜面长5m高1m某工人沿斜面方向把质量为160kg的物体匀速推到顶端如果物体与斜面间的摩擦力
如图所示小丽在研究斜面机械效率时用150N沿斜面向上的推力将重量为360N的物体沿斜面从底部推到高为
如图所示斜面长5m高1m工人用沿斜面方向400N的力把重1600N的木箱匀速推到车上推力对木箱做的功
如图所示斜面长5m高1m工人沿斜面方向用400N的推力把重1600N的集装箱匀速推到车上推力对集装箱
热门试题
更多
VickylikesthebooksheborrowedfromJim. A.who B.that C.whom D.whose
Jim'sataxidriver hereallywantstobeadoctor.A.or B.and C.so D.but
—Youngkidsshouldn'tgoswimmingalone. —.It'stoodangerous. A.You'rewelcome B.Itdoesn'tmatter C.Iagreewithyou D.Idon'tthinkso
—Whatdoyouwanttofortheschoolparty?—Whataboutaneveningdress?
ManykindsofareonshowinChangchunParkeveryyear.flower
—Iamveryworriedabouttomorrow'sEnglishtest.ImafraidIcan'tpassthistime. —!I'msureyou'llmakeit. A.Ofcourse B.Don'tmentionit C.That'sright D.Takeiteasy
Excuseme.Couldyoutellmethewaytotheoffice?Iwanttomailthisletter.
Therewillbemanykindsofrobotinthefuture.
Youareoldenoughtomakedecisionsby.A.himself B.herself C. yourself D.myself
Youcanseemanycarsbusesonthestreet.Soit'sastreet. A.quiet B.busy C.small D.dirty
—Didyourfathertellyou?—No.Maybehetoldmymother.A.whydidhegotoBeijing B.howhegoestoShanghaiC.whenhewouldtraveltoNewYork D.wherehehasspenthisholiday
Kalewantstohavelongcurlylikehermother's.
GarthisregardedasasuccessmusicianinAmericanhistory.
AstimeflyIwillgraduatefrommiddleschoolsoon.
—Whatabeautifulkeyring!isit?—Only5yuan.A.Howold B.Howfar C.Howlong D.Howmuch
—Wouldyouliketogoforvacation? —Yes.I'dloveto.Iliketheplacewhereitispeacefulandbeautiful. A.somewheretouristy B.somewherequiet C.anywheretouristy D.anywherequiet
Chinesebymoreandmorepeopleintheworldnow. A.speak B.spoke C.isspoken D.wasspoken
—Willyoupleasetellmethestoryonceagain?It'ssointeresting. —With.
Weallknowthatplasticbagsweuseitwillbefortheenvironment. A.theless;thebetter B.theless;theworse C.thefewer;thebetter D.thefewer;thebest
Jackwillhaveamathtestthisafternoon.Heneedsa. A.hat B.ruler C.radio D.camera
—I'msohungry.Whenwillmychickensoupbe? —Sorrysir.Itwillbereadyinaminute. A.sold B.served C.eaten D.bought
Schoolisover.Somestudentsarebusy thefloor sweep.
Mountainclimbingisoneofthemostsportssoyouneedtotakecare.
—Iwenttoyourhouseyesterdaybutnobodywasin.—Oh.Ithemovie12YearsaSlavewithmyfriends.A.amwatching B.waswatching C.watched D.hadwatched
Marydecidedtotryoutforavolunteerafter-schoolreadprogram.
girlinredisIndianplayer. A.The;a B.An;a C.The;an D.A;an
Thereisn'tairportnearmyhometown.nearestoneisabouttwohundred kilometersaway.A.a;The B.an;The C.the;A D.the;An
youhavetrieditonyoucan'timaginehowprettythenewskirtis. A.Because B.Although C.Unless D.When
TheGreensliveonthe floorinthistallbuilding.six
Abalanceddietcanhelpuskeep.health
热门题库
更多
教案备课库
教案备课库
高一上学期物理
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库