the following forces:
1. Weight (W): This force acts vertically downwards, representing the car's weight due to gravity.
2. Normal force (N): This force acts perpendicular to the surface the car is skidding on, providing support and preventing the car from sinking into the ground.
3. Friction force (Ff): This force acts parallel to the surface the car is skidding on, in the opposite direction of the car's motion. It is the force that opposes the car's motion and is responsible for slowing it down.
These three forces should be represented on the free-body diagram of a car in a skid with its brakes locked up.
The free-body diagram of a car in a skid with its brakes locked up is best represented by
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