it is emergency please answer it
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it is emergency please answer it
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Explanation:
since this block is kept on spring slowly there is no kinetic energy created
work done by f ext. is
A)W.D. = FORCE × DISPLACEMENT
= fext × - x ( -ve because opposite direction)
= -fext.x
B)here same amount of work is done
fext × +x ( +ve because its going in direction. of force)
= +fext.x