Practice question
Question
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?
Explanation
We can see that solving fully: apply relevant formula, put numbers, compute. Result comes as 1/v² = 1/u² + 2kt. Easy verification shows it satisfies condition.
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