A drag-racing car accelerates forward because of the force exerted on it by the road. Why, then, does it need an engine? Explain. what is the answer plz

The car needs an engine to provide force greater than the frictional force. If there is no engine, the forces are balanced and there is no acceleration.

Well, the drag-racing car might be pretty good at "dragging" itself forward, but without an engine, it would have a hard time doing so! You see, the engine is what generates the power needed to propel the car forward. It provides the force necessary to overcome the resistance of drag and friction, allowing the car to accelerate. So, while the road may help get the car moving, it's the engine that keeps the party going!

A drag-racing car needs an engine because it is responsible for generating the force required to propel the car forward. The engine converts fuel into mechanical energy, which is then used to turn the wheels of the car. This mechanical energy is vital in overcoming the forces of friction, air resistance, and the overall resistance encountered while the car accelerates. Additionally, as the car's speed increases, the amount of force required to maintain that speed also increases. Therefore, the engine provides the necessary power for the car to accelerate against these resistive forces and achieve high speeds.

The drag-racing car needs an engine for several reasons.

Firstly, the engine is responsible for converting fuel into energy. This energy is used to power the car and generate the force necessary for acceleration. Without an engine, the car would not have a source of energy to propel itself forward.

Secondly, the force exerted by the road alone would not be sufficient for the car to accelerate to high speeds. While it is true that the force of friction between the tires and the road contributes to the car's forward motion, it also encounters other forces called resistive forces (such as air resistance and rolling resistance) that oppose its motion. These resistive forces increase as the car's speed increases. Therefore, the car needs an engine to produce additional force to overcome these resistive forces and maintain acceleration.

Lastly, the engine helps in controlling the car's speed and providing power for various aspects such as steering, braking, and operating auxiliary systems. It also enables the driver to manipulate the power output based on their requirements during the race.

In summary, the engine is necessary for a drag-racing car because it converts fuel into energy, which is used to generate the force required for acceleration, overcome resistive forces, and power various components of the car.