ASVAB Mechanical Comprehension Friction Practice Test 940715

Question 1 of 5
Kinetic vs. Static Friction

For any given surface, the coefficient of static friction is higher than the coefficient of kinetic friction. More force is required to initally get an object moving than is required to keep it moving. Additionally, static friction only arises in response to an attempt to move an object (overcome the normal force between it and the surface).

A box is resting on a smooth floor. Static friction is present:

only if normal force is present

when an attempt is made to move the box

if the coefficient of friction is greater than one

at all times