How does retardation affect speed?

Retardation reduces the speed of a moving object. It is the opposite of acceleration, which increases speed. Retardation is caused by a force that acts in the opposite direction to the motion of the object. For example, if a car is moving forward and the driver applies the brakes, the car will slow down or retard its speed. The force of the brakes acting in the opposite direction to the motion of the car causes the car to slow down.

The amount of retardation depends on the strength of the force and the mass of the object. A stronger force will cause a greater retardation, and a heavier object will be more difficult to retard than a lighter object.

Retardation can be used to bring an object to rest, to slow down an object, or to change the direction of motion of an object.