12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
, <br />
π<br />
t = −<br />
0.62 2g<br />
π<br />
= −<br />
0.62 2g<br />
, <br />
∫<br />
1<br />
2<br />
3<br />
2<br />
( 200h<br />
− h<br />
400 3<br />
2<br />
( h 2 5<br />
− h<br />
2 )<br />
3 5<br />
C<br />
=<br />
π<br />
0.62<br />
2<br />
g<br />
) dh<br />
+<br />
14<br />
⋅ ⋅10<br />
15<br />
h t :<br />
π<br />
5 3<br />
3<br />
2<br />
t = (7×<br />
10 −10<br />
h +<br />
4.65 2 g<br />
C<br />
5<br />
3h<br />
h<br />
5<br />
2<br />
h<br />
o<br />
)<br />
t<br />
h<br />
r<br />
h + d h<br />
100cm<br />
=0 = 100