Its more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity, because A) The normal force is greater when the carton is at rest. B) μ_s

Question

Its more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity, because A) The normal force is greater when the carton is at rest. B) μ_s < μ_k. C) Initially, the normal force is not perpendicular to the applied force. D) μ_k < μ_s. E) μ_s = μ_k.

Quizplus · Accepted Answer

The coefficient of static friction (μS) is greater than the coefficient of kinetic friction (μk). Therefore, it takes more force to overcome static friction and start the carton moving from rest than it does to continue pushing it once it is already in motion with constant velocity. This is expressed mathematically as μ_k < μ_s, where U1B1 is the initial force applied to the carton and U1B0 is the force required to keep it moving at constant velocity.

Its More Difficult to Start Moving a Heavy Carton from Rest