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

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

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

What force causes an object to orbit another object in space? A. wind B. friction C. gravity D. magnetism

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

Label each of the following as a contact or noncontact force.  Type "contact" or "noncontact" for each question.a)  gravity   b)  sliding friction  c)  rolling friction   d)  electric force   e)  static friction   f)  fluid friction   g)  tension   h)  magnetic force