Question

Arrange the level of difficulty of walking on the following surfaces in increasing order.
a) On wooden floor b) On concrete floor
c) On wet marble d) On dry marble

• A. c < b < a < d
• B. d < c < b < a
• C. b < a < d < c
• D. a < d < c < b

Answer 1

Answer: (C)

b < a < d < c

Friction is created due to irregularities in the two surfaces in contact. We can walk on a floor when sufficient friction is present there. So, less friction, more difficult it is to walk and a higher chance of slipping. The irregularities on the concrete floor will be most followed by wooden floor, dry marble and wet marble. Thus, the most difficult surface to walk on will be wet marble followed by dry marble, wood and concrete.