* Aerodynamic lift. When the wind flows over the car's body, it creates lift. This lift can cause the car to become unstable and shake. The amount of lift depends on the car's shape, speed, and angle of attack to the wind.
* Crosswinds. Crosswinds can cause the car to sway from side to side. The stronger the crosswind, the more the car will shake.
* Suspension problems. If the car's suspension is not properly functioning, it can also cause the car to shake. This is because the suspension is responsible for keeping the car's wheels in contact with the ground and for absorbing bumps and vibrations.
* Tire problems. If the car's tires are not properly inflated or are worn out, they can also cause the car to shake. This is because the tires are responsible for providing traction and stability.
If your car is shaking in the wind, it's important to have it inspected by a qualified mechanic to determine the cause and have the problem fixed.