Work-Energy Theorem (Grade 12 NSC Matric Physical Sciences): Flashcards

Forces that conserve mechanical energy

Forces that do not conserve mechanical energy

Gravitational forces and spring forces

Friction, air resistance, and applied forces

$W_{net} = \Delta E_k = E_{k,f} - E_{k,i}$

Net work done equals change in kinetic energy

Object gains energy

Object loses energy

When only conservative forces act on an object

Zero (no work done)