A car is traveling at the same speed until the driver pushes on the accelerator causing a net force to act on the car which in turn causes the car to accelerate.Which of the Newton's Laws explains?

Answer 1

All three of Newton's laws are acting in this situation. Newton's first law states that a body at at rest will remain at rest and a body in constant motion will retain that motion unless a force acts to cause an acceleration. This law explains why the car moves with the same speed until the driver pushes the accelerator. Newton's second law states that the acceleration a body is experiencing is proportional to the force acting on the body to cause the acceleration. This law explains why the amount force the driver puts on the accelerator determines the amount of acceleration the car experiences. The third law states that if body A exerts a force on body B, body B will exert an equal but opposite force on body A. This law explains why the car does not fall through the road surface, why the driver can sit in the car and why the accelerator can be pushed.