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

Which of the following is an example of a contact force?Select one:a.gravityb.magnetic forcec.frictiond.electric force

Explain the difference between contact forces and non-contact forces. Give an example of each.

Which of the following statements are true about friction?Friction is a forceFriction is a non-contact forceFriction is a contact forceFriction is a type of support force

Identify which two of the following are non-contact forces.Applied forceGravityAir resistanceMagnetism

Friction is a force that ALWAYS acts:a) In the direction of motionb) Opposite the direction of motionc) Perpendicular to the surfaces in contactd) It depends on the materials in contact