A student notices that it is much harder to start walking on a perfectly polished ice…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A student notices that it is much harder to start walking on a perfectly polished ice rink than on a concrete floor. Which statement correctly explains this observation?
(a) Ice exerts no reaction force on the student’s shoes
(b) The coefficient of static friction on ice is so large that the student cannot overcome it
(c) The maximum static friction on ice is too small to produce the necessary forward thrust
(d) Kinetic friction between ice and shoe is larger than static friction between them