Potential energy change

1. Oct 3, 2013

pratikaman

is it true that potential energy of a particle always decreases in the direction of conservative force acting on it.

2. Oct 3, 2013

tiny-tim

hi pratikaman!
potential energy is defined as minus the work done by a conservative force

so yes, if your displacement is in the direction of the force, the work done is positive, and so the potential energy difference is negative

3. Oct 3, 2013

pratikaman

ok take a inverse square force like A/r^2 always pointing towards origin. where 'A' is some constant and 'r' is distance from origin of force. then potential energy function for this is U= A/r + c . where c is arbitrary constant. then potential in this case increases in direction of force.

4. Oct 3, 2013

tiny-tim

no, U= -A/r + c