Yes, an object can have negative acceleration and still move in the positive direction (velocity). This situation occurs when the object is slowing down or decelerating while still moving in the positive direction.
Acceleration is defined as the rate of change of velocity. It can be positive, negative, or zero. Positive acceleration indicates an increase in velocity, negative acceleration (also called deceleration or retardation) indicates a decrease in velocity, and zero acceleration indicates a constant velocity.
When an object is moving in the positive direction and experiences negative acceleration, it means that its velocity is decreasing, but it is still moving in the positive direction. This is commonly observed when an object is thrown upward against the force of gravity. The object's initial velocity is positive, but the acceleration due to gravity is negative, acting in the opposite direction of the motion.
For example, if you throw a ball upward, it moves in the positive direction (upward) initially, but its velocity decreases due to the force of gravity. The acceleration due to gravity is constant and acts downward, opposing the ball's upward motion. As a result, the ball's velocity decreases, and it eventually reaches its highest point before falling back down.
So, in summary, an object can have negative acceleration and still move in the positive direction (velocity) if it is decelerating or slowing down while moving in that direction.