a)work done by 150N force=F.d=150*6=900 J
b)since it is moving with constant speed so acceleration=0
By newtons law
F-f=0
F=f
f=150 N
work done by friction force=f.d=150*6=900 J
c)F-f=0
150-N=0
=150/N
=150/(40*9.8)=.38
A horizontal force of 150 N is used to push a 40-kg box on a rough,...
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