The situation described in the question can be explained by Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the force applied to the object, and inversely proportional to its mass. This law is expressed by the following equation:
F = ma
where F is the net force applied to an object, m is the mass of the object, and a is the resulting acceleration.
In the case of the racing car, a powerful engine produces a large net force that is applied to the car. Because the mass of the car is very small, the acceleration produced by this force is correspondingly very large. This allows the car to accelerate very quickly to high speeds.
This is also related to Newton's First Law of Motion, which states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an external force. In the case of the racing car, the powerful engine provides the external force needed to overcome the car's inertia and get it moving. Once the car is in motion, it will continue to move at a constant velocity unless another force, such as friction or air resistance, acts to slow it down.