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AP Physics 1: Algebra-Based 3.2 A Describe the Work Done on an Object or System By a Given Force or Collection of Forces 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 work by a constant force from displacement and the force component parallel to it
  • determine positive, negative or zero work from the directions of force and displacement
  • apply net work equals change in kinetic energy to solve for work, force, distance or speed
  • find work or kinetic-energy change from the signed area under a force-position graph
  • calculate energy dissipated by friction from friction force and path length

AP Physics 1: Algebra-Based 3.2 A Describe the Work Done on an Object or System By a Given Force or Collection of Forces Questions 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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