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Position vector of a particle is express...

Position vector of a particle is expressed as function of time by equation `vec(r)=2t^(2)+(3t-1) hat(j) +5hat(k)`. Where r is in meters and t is in seconds.

A

It always moves in a plane that is parallel to the x-y plane.

B

At the instant t=0 s, it is observed at point (0m, -1m, 5m), moving with velocity 3 m/s in the positive y-direction.

C

Its acceleration vector is uniform.

D

It is an example of three dimensional motion.

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A, B, C
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