Final Exam 2 PHYS 1110 Test Questions with All Solved Solutions Set.

centripetal force equation - Answer mv²/r centripetal force - Answer Force toward the center of the circular path friction - Answer A force that opposes the motion of two surfaces in contact static friction - Answer f(s) ≤ µ(s)n (Static friction force is proportional to the normal force between surfaces) kinetic friction - Answer f(k) = µ(k)n (Kinetic friction is proportional to the normal force between surfaces) What type of friction is involved in driving? - Answer Static friction when wheels are turning, kinetic friction if the wheels are skidding drag force - Answer When an object is moving through fluids or air drag opposes the relative motion terminal speed? - Answer The point at which the drag force and gravity have equal magnitudes What is a system? - Answer A system contains one or more objects and is defined by a closed boundary Work - Answer a force applied by an entity outside the system does work on the system work by a constant force - Answer W = F∆x or W = F * d (d = ∆r) unit of work - Answer The Newton Meter or Joule (1 Nm = 1 Joule ) What must be true for work to be done? - Answer Force must have a component in the same direction as displacement