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**Simple velocity vector problem; IS MY SOLUTION MANUAL WRONG OR AM I?!****1. Homework Statement**

A particle starts from the origin with velocity 5i at t=0, and moves in the xy plane with a varying acceleration given by

**a**= 6 Sqrt(t) j, where t is in s.

a.) Determine the vector velocity of the particle as a function of time.

**2. Homework Equations**

Vi=5i; a = 6 sqrt(t)j

Vf=Vi+at

Vf = Vfx +Vfy = (Vix+axt)i+(Viy+ayt)j

=(5+0)i + (0+6sqrt(t)*t)j

=5i +6t^3/2 j

The solution manual states the answer as Vf=5i +4t^3/2 j

Whos right here?