Question

What is the work done in a moving a body over a rough horizontal surface

Answer 1

Let the force applied to displace the block is F and displacement is d and let the friction be uN(u is friction coefficient and N is normal) so work done=force × displacement= (F - f) ×d

Answer 2

Hi Friend!!

Let the force applied to displace the block be= F 
 The displacement is  = d 
 the friction be = f= uN(where u is the  coefficient of friction  and N is the normal force) 
 Now, we know that :
work done
=force × displacement
 =(F - f) ×d
=(F- uN) x d


Hope that answer helped you friend!!
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