In motion with constant acceleration in a plane, what is true if the acceleration is zero?
If the acceleration is zero, the velocity remains constant in both magnitude and direction, resulting in uniform rectilinear (straight-line) motion. Without acceleration, the object continues in its initial state per Newton’s first law.
Ref: NCERT Class 11 Physics > Chapter 6: Work, Energy and Power > Topic: Work, Energy and Power - Work-Energy Theorem