Cite 4 examples to show that it is impossible for an object to have acceleration without its speed changing?

you'll excuse me, but,


if you tie a ball on a string and swing it around you in a circle, it is constantly accelerating (changing direction) but maintaining a constant speed.





it would seem that your request is wrong before you start.Cite 4 examples to show that it is impossible for an object to have acceleration without its speed changing?
The definition of acceleration is either first derivative of speed versus time or the variation of speed divided by variation in time.If the change of speed=0, then the acceleration is also zeroCite 4 examples to show that it is impossible for an object to have acceleration without its speed changing?
its impossible to have nonzero acceleration with no velocity vector change, but there can be constant speed. if accel is not zero then velocity is not constant
I think you mean velocity, not speed. As linlyons said above, otherwise your question is fundamentally wrong. Velocity being a vector takes direction into account so that in that example, even though speed is technically constant velocity is not as it is constantly changing direction.


Acceleration by definition is the rate of CHANGE of velocity. If velocity was constant, it would not change...so there would be no acceleration.