(.. ), . , - , , , . , , . . , , () 10 (0,5 V). 10 , , (. . V), (, . .) 0,5 . , , . 5.1.
5.1. 0 ,
, | |||
t1 £ 10 | S = p(0,5V ´ t1)2 | S = 0,5a(0,5V ´ ´t1)2 | S = na ´ 0,5V ´ t1 |
t1 ³10; t2 = t - 10 | S = p(5V + V ´ t2)2 | S = 0,5a(5V + V ´ ´t2)2 | S = na ´ (5V + V ´ t2) |
t =t - (10+t2) | S = p(5V + V ´ t2 +0,5V ´ t)2 | S = 0,5a(5V + V ´ ´t2 + +0,5V ´ t)2 | S = na ´ (5V + V ´ t2 + +0,5V ´ t)2 |
. t1, t2 - , ; t - , ; t - t, ; n - . .
, , , . , . , , , . (. 5.1 - 5.2). , , , . , . , .
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S - , (. 5.3 - 5.4). h. , - , 5 , - 10 . , ( ), ( ) ( ), 10 , , 20 - . , .
, . 5.2. , , . 1.14 5.1. . 5.3 - 5.5 , .
, : - - . , .
5.2.
, | |||
360 (. . 5.3, ) | R > h S = ph(2R - h) | R > h S = ph(2R - h) | |
90 (. . 5.3, ) | R > h S =0,25ph(2R - h) | R > h S =3,57h(2R - h) | |
180 (. . 5.3, ) | R > h S =0,5ph(2R - h) | R > h S =3,57h(1,4R - h) | |
270 (. . 5.3, ) | R > h S =0,75ph(2R - h) | R > h S =3,57h(1,8R - h) | |
. . 5.4 | b > nh S = nah | b > 2h S = 2h (a+b-2h) |
. a, b R . 5.2 (S = S) , . 1.14 1.15
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5.3.
, | , 2, | , | , 2, | ||
5.4.
, | , 2 | |||||
, . | ||||||
5.5.
, | , 8, | |||||
, | ||||||
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5.6.
, , | , 2, | |||
, 5 | , 10 | , 10 | , 20 | |
, . .
, (. . 5.3 - 5.4), , h. . . 5.2, h, .
1. , . 5.1, , , , , .
.
. 5.1, S = ph(2R - h) =3,14´5(2´205)=550 2
. 5.1. S = S = p´2R2 = 3,14´100 =314 2.
. 5.1. S =0,25ph(2R - h) = 0,25´3,14´10 (2´30-10) =393 2.
. 5.1. S = 3,57h(R - h) = 3,57´5(20-5)= 268 2.
. 5.1. S = 3,57h(1,4R - h)=3,57´5(1,4´20-5)=410 2.
2. , . 5.2, , , , , .
.
. 5.2. S = nah =3´18´5= 270 2.
. 5.2, 8. S = 2h (a+b-2h) = 2´5 (20 + 22 - 2´5) = 320 2.
. 5.2, S = S = ab= 20´5 = 100 2.
. 5.2, S = h (a+b-2h) = 5 (2´20 + 30 - 2´5)= 300 2.
. 5.2, S = nah = 2´20´5 = 200 2.
3. , . 5.1. , 5.2.,
.
. 5.1. =ph(2R - h) =3,14(2´20-5) 110 .
. 5.1., =3,57(1,4R - h)=3,57(1,4´20-5) 82 .
. 5.2. =2(a+b-2h)=2(20+22-2´5)=64 .