AP Physics C: Mechanics 6.4 B Describe How the Selection of a System Determines Whether the Angular Momentum of That System Changes Questions
Practise AP Physics C: Mechanics 6.4.B by deciding whether a cylinder’s angular momentum changes when friction exerts an external torque on the selected system.
Syllabus
Effective Fall 2024
Course
AP Physics C: Mechanics
Exam points
Decide whether a rolling cylinder conserves angular momentum by identifying external frictional torque.
Use the cylinder’s changing angular velocity to justify that its angular momentum is not constant.
AP Physics C: Mechanics 6.4 B Describe How the Selection of a System Determines Whether the Angular Momentum of That System Changes Questions question 1
[Maximum number: 1]
3．A cylinder of mass M and radius R is released from rest at the top of an inclined plane，as shown above． The cylinder rolls without slipping down the incline．The rotational inertia of the cylinder is MR2/2 ．
Is the angular momentum of the cylinder conserved as the cylinder rolls down the vertical distance h ？ Yes No Justify your answer．
．
\begin{tabular}[t]{|l|l|} Selecting＂No＂ & For a correct justification & 1 point Example：The frictional force exerts an external torque on the cylinder therefore the angular momentum of the cylinder is not conserevd． & Example：The angular velocity is changing with h ；therefore，L is changing． &