Question

Workdone due to frictional force is ______________
a)+ve b)-ve c)zero d)maximum​

Answer 1

Explanation:

$\huge\bf{\mid{\overline{\underline{ANSWER:-}\mid}}}$

Work done is Dot product of Force and Displacement

Refer figure....

W = F. S

W = F S cos (a)

W = f S (-1)

W = - f S

So -ve sign shows work done by frictional force is always negative