Question R9 Q25 - NSB MS 2012

A person has to push with greater force to begin moving a heavy crate across the floor. However, once the crate has begun to move, the person can push with less force in order to move the object across the floor at a constant rate. Which of the following best explains such a phenomenon?

W) The coefficient of static friction is greater than the coefficient of kinetic friction, resulting in a greater frictional force before the object has begun to move

X) The coefficient of static friction is greater than the coefficient of kinetic friction, resulting in a greater frictional force after the object has begun to move

Y) The coefficient of kinetic friction is greater than the coefficient of static friction, resulting in a greater frictional force before the object has begun to move

Z) The coefficient of kinetic friction is greater than the coefficient of static friction, resulting in a greater frictional force after the object has begun to move

Science Bowl Question

Take Your Prep to the Next Level