The position vector of a particle is given by r = 3 ,t^2 , i + 2 ,t , j + 5 , k . Which one of the following statements is correct?

NDA 2026 Physics question

The position vector of a particle is given by . Which one of the following statements is correct?

(A)The force acting on the particle is parallel to the instantaneous momentum of the particle.
(B)The force acting on the particle is perpendicular to the instantaneous momentum of the particle.
(C)The particle experiences zero force.
(D)The force acting on the particle is not parallel to the instantaneous momentum of the particle.Correct

Answer: (D)

and . The force is along and is non-zero, while the

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Question ID VK-033248