Street Survival - Advanced Defensive Driving



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A slide can be induced into a vehicle because of a force along the vertical axis.

As a result of such a force, there is less downward pressure of the tires onto the road and could reach the point where traction is lost or if the force is great enough, even lift off from the road surface.

Some of the possible causes are listed below:

  • Hitting a bump in the road at a high enough speed.

  • Hitting an obstacle in the road at a sufficient speed.

  • Traveling over a dip in the road at a minimum speed.

  • Defective suspension that allows a wheel to bounce.

  • Hydroplaning when hitting a pool of water at a high enough speed.

🛈 Info:

Defensive Sliding Vertical

🛈 Vertical forces on a vehicle in motion

  • When a vehicle is in motion, it is subject to several vertical forces, including:

  • Weight: The weight of the vehicle is the force exerted by gravity on the mass of the vehicle. The weight of a vehicle affects its stability and handling, and can cause compression forces on the suspension system.

  • Aerodynamic forces: Aerodynamic forces are the forces created by the airflow around the vehicle. These forces can include lift and drag, and can affect the stability and control of the vehicle.

  • Road surface forces: The interaction between the tires and the road surface can create vertical forces, including the normal force and the frictional force. The normal force is the force exerted by the road surface on the tires, which is equal and opposite to the weight of the vehicle. The frictional force is the force created by the interaction between the tires and the road surface, which affects the traction and braking ability of the vehicle.

  • Suspension forces: The suspension system of a vehicle is designed to absorb and dampen the vertical forces created by the weight of the vehicle, road surface forces, and aerodynamic forces. The suspension system can compress and rebound in response to these forces, which can affect the ride comfort and handling of the vehicle.

Understanding the vertical forces acting on a moving vehicle is important for vehicle design and safety, as well as for understanding the physics of vehicle dynamics.

Engineers and designers use this knowledge to optimize the design of vehicles for stability, handling, and safety, while drivers can use this knowledge to adjust their driving habits based on road conditions and vehicle performance.

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Street Survival - Advanced Defensive Driving