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Subject :NSO    Class : Class 6

Which of the following demonstrate friction role?
(i)   A ball rolling
(ii)  Slipping of a man on wet floor
(iii) Walking
(iv)  Sleeping

A(i) and (ii)
B(i) , (ii) and (iii)
C(ii) , (iii) and (iv)
D(i) and (iii)

How does the slipping of a man on a wet floor demonstrate friction? The solution given is wrong.

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