Mechanical comprehension · Difficulty 1
Try this ASVAB-style question.
Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.
Which statement best describes friction?
- a force that opposes relative motion between contacting surfaces
- the turning effect of a force about an axis
- force applied through a distance in the force direction
- the relationship between the tooth counts of meshing gears
Reveal answer and explanation
a force that opposes relative motion between contacting surfaces
friction is a force that opposes relative motion between contacting surfaces. Brake pads slow a rotor by rubbing against it.