CTO Banned 注册 2004-04-15 消息 1,778 荣誉分数 44 声望点数 0 所在地 您的居住地 2004-09-23 #1 我的答案。。。 1-- C(5,4) D(-1,8) C(6.4,39') D(8.1,97') 2-- distance: 8.60m (4.47,297') (4.24,315') 3-- d 4-- 太简单，说起来太复杂。不说了。 5-- a) 7.17km b) 6.15km
我的答案。。。 1-- C(5,4) D(-1,8) C(6.4,39') D(8.1,97') 2-- distance: 8.60m (4.47,297') (4.24,315') 3-- d 4-- 太简单，说起来太复杂。不说了。 5-- a) 7.17km b) 6.15km
S shengudai 新手上路 注册 2004-02-05 消息 211 荣誉分数 0 声望点数 0 2004-09-24 #7 agree with Cotta 4. a=1.3 a=2 10-12sec a=-1 I'm little poor with that,so am I right?
Cotta 我爱蛋蛋 VIP 注册 2004-05-08 消息 7,295 荣誉分数 253 声望点数 193 2004-09-24 #8 it is right.. but the answer for C in the question 4 also inlcude the time t=6s.... because when t=6s then the slope of the tangent line to this point is zero which means the accelaration equals zeao.
it is right.. but the answer for C in the question 4 also inlcude the time t=6s.... because when t=6s then the slope of the tangent line to this point is zero which means the accelaration equals zeao.
S shengudai 新手上路 注册 2004-02-05 消息 211 荣誉分数 0 声望点数 0 2004-09-25 #9 I checked the solution posted on website,my c,d are wrong
