A2L Item 148

Goal: Hone the concept of conservative force

Source: UMPERG-ctqpe67

The
potential energy function for a certain body is shown at right. The
force associated with this potential is …

  1. conservative.
  2. dissipative.
  3. neither conservative or dissipative.
  4. Cannot be determined

Commentary:

Answer

(1) It is remarkable how many students will select one of the
other answers. Many students do not recognize that you cannot have a
potential function unless the force is conservative.