PHY 1301A Assignment

[CTO]

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

 

[CTO]

有没有不一样的

 

[我是谁？]

一样，放心吧。

 

[Cotta]

差不多..

 

[zaizai]

差不多~
基本都一样~

 

[Cotta]

第二题我的是135不是315..

 

[shengudai]

agree with Cotta

4.
a=1.3
a=2
10-12sec
a=-1
I'm little poor with that,so am I right?

 

[Cotta]

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.

 

[shengudai]

I checked the solution posted on website,my c,d are wrong