20When two objects rub together, the force that opposes the motion of the objects is called _______. A. gravity B. magnetism C. electricity D. friction

Which of the following forces can both attract and repel some objects without touching them? A. magnetism B. spring C. friction D. gravity

Identify the force that occurs when one object rubs against another.

Which force always opposes the motion of an object?a) Gravitational forceb) Frictional forcec) Magnetic forced) Tension force

What is the force that acts on an object and opposes its motion called?frictionthermal energyinertia

The force made by a magnet is special because it can make other magnets and some metal objects  _______ without ever touching them. A. explode B. melt C. disappear D. move