Can a particle in one-dimensional motion have zero speed and non-zero velocity?

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Solution

The only difference between velocity and speed is in the direction.
If the body is moving in one dimension, the direction of the body will remain constant.
Velocity behaves like speed in one-dimensional motion, velocity is also 0 when speed is zero.
As a result, a particle moving in one dimension has never had zero speed and non-zero velocity.

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