An object of mass ' 
' initially at rest on a smooth horizontal plane starts moving under the action of force 
. In the process of its linear motion, the angle 
(as shown in figure) between the direction of force and horizontal varies as 
, where 
is constant and 
is the distance covered by the object from the initial positon. The expression of kinetic energy of the object will be 
, The value of 
is_)__
Smooth horizontal surface
Text Solution
Verified by Experts2
(2)
According to Work Energy Theorem, 
Taking motion only along horizontal direction(X) i.e., linear motion as mentioned in question, 
Hence 
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