How long will the particle move?

A particle moves with an initial velocity V V and retardation k v kv , where v v is its velocity at any time t t ( k is a positive constant). Pick the correct statement for the motion of the particle.

The particle will continue to move for a very long time The particle will stop shortly The velocity of particle will become V 2 \frac{V}{2} after time 1 k \frac{1}{k} Can't say

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