Define non-conservative force (5.1).

Step 1: Define non-conservative force (5.1).
A non-conservative force is a force for which the work done on an object depends on the path taken between the initial and final positions. Examples include friction and air resistance.

Step 2: Calculate the change in kinetic energy from point A to point B (5.2).
The mass of the car is $m = 200$ kg.
The speed at point A is $v_A = 4$ m/s.
The speed at point B is $v_B = 2$ m/s.

The kinetic energy at point A is:

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