Question

what is positive deceleration, negative deceleration, positive acceleration, and negative acceleration

Answer 1

I know about Positive and Negative Acceleration.. :)

Answer 2

positive or negative just indicates direction, because acceleration is a vector quantity it needs a direction. acceleration is an increase in magnitude of velocity from initial to final (speeding up). deceleration is a decrease in magnitude of velocity from initial to final (slowing down). now give me a medal.