A block of mass 2 kg initially at rest moves under the action of an applied horizontal force of 6 N on a rough horizontal surface. The coefficient of friction between block and surface is 0.1. The work done by the applied force in 10 s is (Take 
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Text Solution
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: The various forces acting on the block is as Shown in the figure.
Here, 
Force of friction,
Net force with which the block moves
Net acceleration with which the block moves
Distance travelled by the block in 10 s is
As the applied force and displacement are in the same direction, therefore angle between the applied force and the displacement is 
Hence,
Work done by the applied force,
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