Work is the result of a force causing displacement. Mathematically, it's $W = Fd\cos\theta$, where $F$ is force, $d$ is displacement, and $\theta$ is the angle between them.

Kinetic Energy is the energy of motion. It's calculated as $KE = \frac{1}{2}mv^2$, where $m$ is mass and $v$ is velocity.

The net work done on an object equals the object’s change in kinetic energy.

Conservative forces (like gravity and springs) depend only on position.

Non-conservative forces (like friction and air resistance) depend on velocity.

The object speeds up, increasing its kinetic energy.

The object slows down, decreasing its kinetic energy.

The kinetic energy remains constant.

Friction, a non-conservative force, causes energy loss, typically converted to heat.

Conservative forces: Work done is path-independent, energy is conserved. Non-conservative forces: Work done is path-dependent, energy is not conserved (e.g., converted to heat).