What is negative acceleration

Stop confusing him with wrong answers! Actually, negative acceleration means the acceleration in the opposite direction of motion For understanding this you need to understand about sign convention in physics, For example:- If a body is moving in north direction with a constant velocity, you assume that the north direction is positive Therefore, the south direction will be negative When the body was moving in the north direction(positive direction), the velocity will be positive and if the body will move in the south direction its velocity will get negative. This happens because the velocity is a vector quantity and it needs magnitude and direction also it does not depend on decreasing or increasing of magnitude in depends also on the direction The same applies on the acceleration also if a body is accelerating in the positive direction is side acceleration will be positive and give the body will accelerate in the negative direction it acceleration will be negative For example:- a car is moving with a constant acceleration in the positive direction if the driver applies the break the car will have a retardation and hence after sometime the car will stop But in reality the brakes accelerate in the opposite direction of the motion and by various factors like friction brings to rest Your school teachers will tell you that retardation is the decreasing of velocity but in reality it is the acceleration only but in the opposite direction This will help you in your 11th class and 12th also but if you will follow this you will definitely face many problems in your class

Rate of change of velocity with time at a negative rate is called negative acceleration

Negative acceleration: A body is said to be in negative acceleration when its velocity is getting reduced with respect to time. Example: Slow down of car on the application of brakes. Thus, speeding up a car is an example of positive acceleration and slowing down a moving vehicle is an example of negative acceleration.

decrease in the change of velocity of a body per unit time