Which descriptions refer to fog? check all that apply.
burns off when it gets dark
forms at or near the ground
extends up to 10 miles into the sky
found in areas near bodies of water
forms when the ground warms at night after a cool, dry day

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on