Cars are made of different materials, including steel, aluminum, and plastic. Steel is the most resistant to bullets, while aluminum and plastic are less resistant. The thickness of the material also matters; thicker materials are more difficult to penetrate than thinner materials.
A .50 caliber bullet is a large bullet with a high muzzle velocity. This means that it has a lot of energy and can penetrate a lot of material. However, even a .50 caliber bullet can be stopped by a thick enough piece of steel.
For example, a .50 caliber bullet can penetrate a car door made of thin steel, but it may not be able to penetrate a car door made of thick steel. A .50 caliber bullet can also penetrate a windshield, but it may not be able to penetrate the engine block of a car.
In general, a .50 caliber bullet can penetrate most cars, but there are some exceptions.