A particle moves in a horizontal straight line under retardation kv3, where v is the velocity at time t and k is a positive constant. If initial velocity be u and x be the displacement at time,then which one is correct?

A particle moves in a horizontal straight line under retardation kv3,

1.	A particle moves in a horizontal straight line under retardation kv3, where v is the velocity at time t and k is a positive constant. If initial velocity be u and x be the displacement at time,then which one is correct?
A.	1/v<sup>2</sup> = 1/2u<sup>2</sup> + 2kt
B.	1/v<sup>2</sup> = 1/2u<sup>2</sup> 2kt
C.	1/v<sup>2</sup> = 1/u<sup>2</sup> 2kt
D.	1/v<sup>2</sup> = 1/u<sup>2</sup> + 2kt
Answer» E.

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A particle moves in a horizontal straight line under retardation kv3, where v is the velocity at time t and k is a positive constant. If initial velocity be u and x be the displacement at time,then which one is correct?

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