1.

The kinetic energy K of a particle moving in a straight line depends on the distances as K =as^2. The force acting on the particle is (where a is a constant)

Answer»

2AS 
as 
2a 
`sqrt(as^2)`

Solution :Here kinetic energy `K = 1/2 mv^2 = as^2`
`:. mv^2 = 2as^2`
Differentating EQN .(i) w.r.t TIME t, we get
`2 mv (dv)/(dt) = 4as (DS)/(dt) = 4 asv" or " m (dv)/(dt) = 2as` .


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