A horizontal force of 150 N is used to push a 40-kg box on a rough,...

Question

Question

Answer 1

Answer #1

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- $\mu$ N=0

$\mu$ =150/N

$\mu$ =150/(40*9.8)=.38

Answer 2

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