👉 In physics, a retardive effect is an effect caused by the presence of a physical object or medium that opposes motion. When this object or medium is present in front of a moving object, it can cause the object to move backward relative to its velocity due to the opposing force. For example, if you are driving down a road and you see a car behind you, but you have been speeding, you will feel the car going backwards as it moves away from your speed. This is an example
