1.

A particle of mass m is moving in a straight line is acted on by an attractive force( m k^2 a^2)/(x^2) forx ge aand( 2m K ^2 x)/( a) forx lt2.If the particle starts from rest at the point x = 2a, then it will reach the point x = 0 with a speed

Answer»

`k sqrt(a)`
`k`
`k sqrt(3a)`
`1 / ksqrt(a)`

Answer :C


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