An object starts with velocity $u$ and moves with acceleration $a$. It travels along a straight path, covers a displacement $s$ and ends with final velocity $v$. These quantities are linked by the equation shown below. $v^2 = u^2 + 2as$ What condition has to be met for this equation to be valid for the object's motion?
- AThe direction of $a$ is constant and the direction of $a$ is the same as the direction of $s$.
- BThe direction of $a$ is constant and the direction of $a$ is the same as the direction of $u$.
- CThe magnitude of $a$ is constant and the direction of $a$ is constant.
- DThe magnitude of $a$ is constant and the direction of $a$ is the same as the direction of $v$.