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Senin, 08 Februari 2010
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SOAL DAN JAWABAN TEST MEKANIKA 1
SOAL DAN JAWABAN TEST 1
KESEIMBANGAN
Hitung :
- Reaksi Tumpuan
- Buat Daftar
Penyelesaian.
- Hitung reaksi tumpuan
RAV = RBV = ½ 
= ½ X ( 3 T )
= 1,5 T
- Menghitung
Titik A.
E V=0
RAV + S1 . Sin 45 = 0
1,5 + S1 . 0,707 = 0
S1 = - 1,5 / 0,707
= - 2,121 T ( tekan )
EH = 0
S1 . Cos 45 + S5 = 0
-2,121 . O,707 + S 5 =
S5 = 1, 499 T ( tarik )
Titik F
EV = 0
- S 9 – S 1. Sin 45 = 0
- S 9 – ( - 2,121 . 0,707 ) = 0
- S 9 + 1, 499 = 0
S 9 = 1,499 T ( Tarik )
E H = 0
S 2 + S 12 . Sin 45 – PI = 0
1,499 + S 12 . 0,707 – 1 = 0
S 12 . 0,70-7 = - 0,499
S 12 = - 0,499 / 0,707
S 12 = - 0,706 T ( Tekan )
TITIK C
EV = 0
+ S 9 + S 12 . Sin 45 - P 1 = 0
1,499 + S 12 . 0,707 – 1 = 0
1, 499 + S 12 .0,707 – 1 = 0
S 12 . 0,707 = - 0,499
S 12 = - 0,499 / 0,707
S 12 = - 0,705 T ( TEKAN )
E H = 0
- S 5 + S 6 + S 12 .COS 45 = 0
- 1, 499 + S 6 + ( - 0,705 . 0,707 ) = 0
- 1, 499 + S 6 – 0, 498 = 0
S 6 = 1, 997 T ( TARIK )
TITIK D
EV = 0
+ S 10 – P2 = 0
+ S 10 – 1 = 0
S 10 = 1 T ( TARIK )
EH = 0
-S6 + S 7 = 0
- 1,997 + S 7 = 0
S 7 = 1, 997 T ( TARIK )
- DAFTAR
| NO BATANG | TEKAN ( T) | TARIK ( T ) |
| 1 = 4 | 2,121 | |
| 5 = 8 | | 1,499 |
| 9 = 11 | | 1,499 |
| 2 = 3 | 1,499 | |
| 6 = 7 | | 1,997 |
| 12 = 13 | 0,705 | |
| 10 | | 1 |
| | | |
| | | |
SOAL DAN JAWABAN TEST MEKANIKA 1
SOAL DAN JAWABAN TEST 1
KESEIMBANGAN
Hitung :
- Reaksi Tumpuan
- Buat Daftar
Penyelesaian.
- Hitung reaksi tumpuan
RAV = RBV = ½
= ½ X ( 3 T )
= 1,5 T
- Menghitung
Titik A.
E V=0
RAV + S1 . Sin 45 = 0
1,5 + S1 . 0,707 = 0
S1 = - 1,5 / 0,707
= - 2,121 T ( tekan )
EH = 0
S1 . Cos 45 + S5 = 0
-2,121 . O,707 + S 5 =
S5 = 1, 499 T ( tarik )
Titik F
EV = 0
- S 9 – S 1. Sin 45 = 0
- S 9 – ( - 2,121 . 0,707 ) = 0
- S 9 + 1, 499 = 0
S 9 = 1,499 T ( Tarik )
E H = 0
S 2 + S 12 . Sin 45 – PI = 0
1,499 + S 12 . 0,707 – 1 = 0
S 12 . 0,70-7 = - 0,499
S 12 = - 0,499 / 0,707
S 12 = - 0,706 T ( Tekan )
TITIK C
EV = 0
+ S 9 + S 12 . Sin 45 - P 1 = 0
1,499 + S 12 . 0,707 – 1 = 0
1, 499 + S 12 .0,707 – 1 = 0
S 12 . 0,707 = - 0,499
S 12 = - 0,499 / 0,707
S 12 = - 0,705 T ( TEKAN )
E H = 0
- S 5 + S 6 + S 12 .COS 45 = 0
- 1, 499 + S 6 + ( - 0,705 . 0,707 ) = 0
- 1, 499 + S 6 – 0, 498 = 0
S 6 = 1, 997 T ( TARIK )
TITIK D
EV = 0
+ S 10 – P2 = 0
+ S 10 – 1 = 0
S 10 = 1 T ( TARIK )
EH = 0
-S6 + S 7 = 0
- 1,997 + S 7 = 0
S 7 = 1, 997 T ( TARIK )
- DAFTAR
| NO BATANG | TEKAN ( T) | TARIK ( T ) |
| 1 = 4 | 2,121 | |
| 5 = 8 | | 1,499 |
| 9 = 11 | | 1,499 |
| 2 = 3 | 1,499 | |
| 6 = 7 | | 1,997 |
| 12 = 13 | 0,705 | |
| 10 | | 1 |
| | | |
| | | |