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Why should one take short footsteps whil...

Why should one take short footsteps while walking on ice ( or oily surface ) ?

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To walk, one exerts a force F obliquely on the ground Fig. The ground also exerts an equal and opposite reaction force R on the man. It is the horizontal component H, of R , which makes walking possible. Frictional force f supplies this horizontal component. As an icy surface is very smooth the frictional force is very small. Hence any attempt to take longer steps can make H greater than the limiting friction. As a result, the person may slip forward.
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