Jawabanmu

2014-08-19T11:29:40+07:00
V=vo+integ.a.dt
v=2i+integ(4ti+6j)dt
v=2i+2t²i+6tj
v=(2t²+2)i+6j

v,t=2sec
v=[2(2)²+2)i+6j
v=10i+6j

v=√10²+6²
v=√136
v=11,6