Question

If a material point moves in the negative direction of the ox axis (has a
negative velocity) and then stops, what is its acceleration? What is the projection
of acceleration on the direction of travel?
1) Positive,
2) negative,
3) equal to zero,
4) the question is incorrect.

Answer 1

If  a material point stops, the projection of acceleration on the direction of travel is negative.

A material point moves in the negative direction of the ox axis, so the acceleration is positive.