Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   Friction's work is path-independent

   Statements

   1. Conservative work is path-independent
   2. Conservative work round a loop is zero
   3. Friction's work is path-independent

2. False statement

   Potential energy suits friction

   Statements

   1. Potential energy suits friction
   2. Net work changes kinetic energy
   3. Potential energy suits conservative forces

3. False statement

   A closed path always gives non-zero work

   Statements

   1. Work depends on force and displacement
   2. A closed path always gives non-zero work
   3. A closed path returns to the start

Explanation