Answer:
Explanation:
Given
W amount of work is done on the system such that it acquires v velocity after operation(initial velocity)
According to work energy theorem work done by all the forces is equal to change in kinetic energy of object

where m=mass of object
v=velocity of object
When the object is already have velocity v then the final speed is given by work energy theorem

From 1 and 2 we get



a 10 kg block reaches a point with a velocity of 15 m per second and slides down a rough track my the coefficient of the kinetic energy between the two surface ab and the block iis0.52
If both the net force and the mass are doubled, the acceleration will be unchanged.
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