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It is more difficult to walk on ice than on a concrete road because

  • A.There is very little friction between the ice and feet pressing it
  • B.Ice is soft when compared to concrete
  • C.There is more friction between the ice and the feet
  • D.None of these

Answer: A

Because there is very little friction between ice and the feet.

Walking depends on pushing backwards against the ground and receiving a forward frictional reaction. Ice has a very low coefficient of friction, made lower still by a thin film of meltwater, so the foot slips instead of gripping.

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