Jawabanmu

2014-09-06T15:06:41+07:00
Dik 
m = 20 kg
a = 5 m/s
ΣF =?
maka
ΣF = m.a
ΣF = 20 .5
ΣF = 100 N


ket
m = massa
a= percepatan
ΣF = resultan gaya yg bkrja


semoga membantu ^-^