Is there a possibility for a situation in which there exists an acceleration with no change in the speed of the object?

Question

Extrinix · Answer

There is no possibility in any situation for this to happen. In order for acceleration to occur, the object must either A, increase or decrease its speed; or B, change the direction and speed. Either way, the object has to use speed in order to accelerate or decelerate. Therefore making acceleration (and deceleration) physically not possible to occur without the need of changing speed.

GoodFellow · Answer

What about a uniform circular motion? constant speed while accelerating towards the centre?

Vocaloid · Answer

Politely disagree with the previous response. In physics, acceleration is a vector which means it includes both a magnitude and direction. It is possible to change the direction without changing the speed and thus changing the acceleration.

Extrinix · Answer

I guess you could say a rapid turn in direction could create enough force for that

GoodFellow · Answer

Thank you everyone for your effort.