What causes a car to move forward?

When you press the accelerator pedal in a car, it causes the engine to produce more power. This power is transmitted to the wheels through the drivetrain, which includes the transmission, driveshaft, and axles. The wheels then turn, propelling the car forward.

In more detail, here are the steps involved in how a car moves forward:

1. You press the accelerator pedal, which is connected to the throttle body in the engine.

2. The throttle body opens, allowing more air to flow into the engine.

3. The increased airflow causes more fuel to be injected into the engine.

4. The fuel-air mixture is then compressed and ignited by the spark plugs.

5. The resulting combustion creates hot gases that expand, pushing the pistons downward.

6. The downward motion of the pistons turns the crankshaft, which is connected to the transmission.

7. The transmission then transfers the power from the crankshaft to the driveshaft.

8. The driveshaft sends the power to the axles, which are connected to the wheels.

9. The wheels turn, propelling the car forward.

The speed at which the car moves forward depends on how much you press the accelerator pedal and the gear that you are in. The higher the gear, the faster the car will move.