Question

Olivia bought new gym shoes to play volleyball because she kept slipping when she ran in her old shoes. How will the new soles help solve the problem?

by increasing her speed to increase friction
by adding surface roughness to increase friction
by improving aerodynamics to decrease friction
by increasing lubrication to decrease friction

Answer 1

The new shoes will help her by adding surface roughness to increase friction.

Answer 2

ANSWER:

The new soles help solve “the problem by adding surface roughness to increase friction”.

EXPLANATION:

Olivia problem was that she was constantly slipping in her old shoes, now as the soles have become old the ridges underneath, the soles have worn out making them flat, hence giving zero static friction, static friction holds the surface of an object on another surface depending on the roughness of the surface. For example, a sleigh on an inclined ice path will slip without any need of force as the friction between the surfaces is low, in case of Olivia the friction is lowered drastically as there is no roughness present in her old shoes. Therefore, to avoid slipping Olivia has to increase friction by adding roughness to her soles.