Page 191 - FISIKA SMA KELAS X

3. Gerakan dari A ke B
b. 1 2
v = v + at h 2 = v o − t + gt 2
2
t o 1 2 2
40 = 0 + 2t 1 h 2 = 1000 − 500
t = 20 sekon h = 500 m
1 2
1⁄
2
S AB = v t + at = 400 m h=h 1 + h 2 = 1500 m
2
o 1
1
.
S = S – S = 200 m v = 2 gh = 30 000
BC AC AB t
v
Gerakan dari B ke C t = 173 2 m/s,
S BC = V . t 2 BAB 3
2
200 = 40 . t
2
A.
t = 5 sekon
2
t = t +t = 25 sekon 1. A
1 2
3. B
5.
1 1 1
+ =
s s' f
1 1 1
− =
∞ 50 f
f =− 50 cm

100
2 p = = − 2D
mv
F = f
s
R 5. D
2
mv f < s < 2f
N − W = ob ob ob
R 7. A
2
,
002 . v s ok < f ok
06 − 0 2, =
,
02 9. B
,
,
2 008
v = = 4
,
002 B.
v = 2 m/s 1.
1 1 1
7. ΣF = m . a + =
s s' f
F + F cos α = m . a 1 1 1
2
1
± =
2 + 0,5 = 2a
25 50 f
a = 1,25 m/s 2 f = 50 cm

1 2 100
S = v t + at p = = 2D
o
2 f
1
S =+ . 1,25 . 100 3.
0
2 100 100
f = = cm
S = 62,5 m
p 20 5 ,
9. a. v 2 = v 2 + 2ah 1 1 1
t 1 o 1 + =
v 2 = 6400 + 3600 s s' f
t 1 1 1 20 5 ,
v = 100 m/s + =
t 1 s 5 100
v = v v v 1 0 5 ,
t 2 o – gt ⇒ o = t 1 =
2
2
2
0 = 100 = 10t s 100
2
s = 200 cm
t = 10 sekon
2
184 Kunci Jawaban