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The deceleration exerienced by a moving ...

The deceleration exerienced by a moving motor blat, after its engine is cut-off is given by `dv//dt=-kv^(3)`, where `k` is constant. If `v_(0)` is the magnitude of the velocity at cut-off, the magnitude of the velocity at a time `t` after the cut-off is.

A

`V_0//2`

B

`v_0`

C

`frac(v_0)(sqrt 2v_0^2kt+1)`

D

`v_0c^-kt`

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