Is is possible for an object, which is moving in one direction, to reverse directions without ever stopping?

For example, if a wheel is spinning, is it possible for the direction in which it is spinning to be reversed without ever stopping for a moment?





If so, how?





Is not, why?Is is possible for an object, which is moving in one direction, to reverse directions without ever stopping?
No, it is impossible. To change directions by reversing it must stop, even if it is for a billionth of a millisecond or shorter.Is is possible for an object, which is moving in one direction, to reverse directions without ever stopping?
No I agree with futurast-- it will mean infinite acceleration and therefore infinite force which is an impossibility!
mmmmmmmmmmmmmmm


i wonder
it is possible, but is very hard, and requires a lot of energy due to inertia. Inertia is the tendancy for all objects to keep going in the direction and velocity that it is going in. Because of this, a force would have to be able to accelerate the wheel the opposite direction and overcome its inertia.
An object could reverse direction by making a loop and therefore never stop. The formula for acceleration = F=ma would indicate that the velocity in a straight line can not reverse without going through zero.





I think the answer to your question is ';no';.
The term ';stop'; is relative to perspective. If you where looking at the wheel, for instance, you could just turn it over, it would appear to be spinning the other way.





If you where on the wheel, it would have to ';stop'; to turn the other way.
Sure-- if it rolls along a loop, when it gets to the top of the loop it will be going the opposite direction without having stopped.