Jawabanmu

2014-02-02T19:59:01+07:00
T = 15 sekon
perlambatan =
20 - x = 11
x = 9
perlambatan: 9/15
3/5 m/s2
1 5 1
2014-02-02T19:59:19+07:00
Dik :
Vo = 20 m/s
Vt = 11 m/s
t = 15 s

dit = a?
jawab: 

a = Vo-Vt/t = 20-11/15
   = 9/15
   = 0,6