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AP Physics 1: Algebra-Based 3.2 Work Questions

Describe work as energy transferred by a force through displacement, using force direction, force-position graphs, and kinetic-energy changes.

Syllabus
Effective Fall 2024
Course
AP Physics 1: Algebra-Based

Exam points

  • calculate signed work from displacement and the parallel component of a constant force
  • apply net work equals change in kinetic energy to solve for work, force, distance or speed
  • determine work or kinetic-energy change from signed area under a force-position graph
  • calculate frictional energy dissipation from force and path length
  • compare conservative-force work along different paths between common endpoints

Covered syllabus points

3.2.A—Describe the work done on an object or system by a given force or collection of forces

Question 1

[Maximum number: 1]

(12 points, suggested time 25 minutes)
A block is initially at position x=0 and in contact with an uncompressed spring of negligible mass. The block is pushed back along a frictionless surface from position x=0 to x=-D, as shown above, compressing the spring by an amount Δx=D\Delta x=D. The block is then released. At x=0 the block enters a rough part of the track and eventually comes to rest at position x=3 D. The coefficient of kinetic friction between the block and the rough track is μ\mu.

Which aspects of the student's reasoning, if any, are incorrect? Explain how you arrived at your answer.

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