Jawabanmu

2014-09-07T09:25:02+07:00
A=F:M
  =300 N : (80 KG + 20KG)
  =300 N : 100KG
  =3 m/s2 (pangkat 2)
2014-09-07T09:25:27+07:00
Percepatan (a) = gaya (F) dibagi massa (m).
F = 300N
m gerobak = 20kg
m muatan = 80kg
m total = 100kg

a = 300 / 100
= 3 m/s²