Hi, i have a question regarding kinematics.

I know that acceleration is the rate of change of velocity.

and if a<0, it is known as deceleration.

Consider a particle moving in a straight line and the velocity is given by

v(t)=1-t, a simple linear function,

For 0<t<1, acceleration is -ve so the particle is decelerating.

At t=1, v=0, so the particle is at rest.

Then for t>1, the particle change direction and increases its speed.

However, for t>1, acceleration, dv/dt is still -ve, but it is not decelerating for t>1 right? It should be accelerating!

Can anyone correct my concept?? I m quite confused about this part.

Thanks!!