Questions
A person travels certain distance on a rough horizontal surface. Work done by frictional force is
a
Positive
b
Negative
c
Zero
d
Maximum
detailed solution
Correct option is C
As the frictional force between feet and ground is static, there is no slipping between feet and ground soS=0 ⇒W=F→.S→=F.SCOSθ=F×0×COSθ=0Talk to our academic expert!
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