Perpendicular Velocity and Acceleration Vectors
The position of a particle moving in the xy-plane is given by the vector function r(t) = (3t²)i + (4t)j, where r is in meters and t is in seconds. For which time t > 0 is the particle’s velocity vector perpendicular to its acceleration vector?
A
Never; they are always parallel or antiparallel
B
t = 0 s
C
t = 2/3 s
D
t = 4/3 s
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