The centre of mass of a system cannot change its state of

Last updated: 6/4/2023

The centre of mass of a system cannot change its state of motion unless there is an external force acting on it Yet the internal force of the brakes can bring a car to rest Then a the brakes stop the wheels b the friction between the brake pads and the wheel stops the car c the car is stopped by the road d the car is stopped by the driver pressing the pedal