NCEA Level 3 Physics – Mechanics Practice Exam

The term for the speed of an object that remains constant is "Constant Speed." This term indicates that the object travels equal distances in equal intervals of time, regardless of how small those time intervals are. For example, if a car is moving at a constant speed of 60 km/h, it covers 60 kilometers every hour without speeding up or slowing down.

It's important to also understand the other options to appreciate why "Constant Speed" is the best choice. Variable Speed refers to a situation where an object's speed changes over time, which is the opposite of constant speed. Acceleration is the rate of change of velocity over time, meaning that if an object is accelerating, its speed is not constant. Average Speed is calculated as the total distance traveled divided by the total time taken, which may or may not reflect the speed at any specific moment; thus, it does not convey the same meaning as constant speed.