Jawabanmu

2014-09-03T20:52:02+07:00
T1=0 a1= 2.0.i+3.0^2j = 0
t2=2 a2=2.2.i+3.2^2=4i+12j
a`= DElTAa/delta t = 4i+12j/2= 2i+6j m/s
2014-09-03T20:56:19+07:00
A= 2ti+3t^ja
Ditanya v saat t=2s
Jawab : 
v =vo +a.dt
v = 0 + t^2i + t^3j
t=2 s maka v = 4i + 8j
v = |v| = √(4^2 + (8)^2
|v| = √80 = 4√5 m/s
Itu rumusnya v=vo + <simbol integral> a.dt