The speed that does not change is called "constant speed." In physics, speed refers to the rate at which an object covers a certain distance over a given period of time. The correct answer is4) constant speed.When an object maintains aconsistent speedwithout any changes or variations, it is said to have a constant speed. This means that the object covers equal distances in equal intervals of time, maintaining a steady and unchanging pace.Constant speed is an important concept inphysicsand is often used to describe the motion of objects in various scenarios, such as uniform linear motion or circular motion at aconstant angular velocity.Therefore, the correct answer is4) constant speed.For more details regardingconstant speed, visit:brainly.com/question/30551791#SPJ6...

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