KEAM 2019 Physics and Chemistry Paper

The velocity of a object is given by equation
v(t)=v0−5t+5t2
Acceleration
at t=0 the acceleration of object
a=−5+10(0)=−5ms−2
So, at time t=0, there is deceleration of object.
at ‌‌t=1s,v=v0−5+5=v0ms−1
and a=−5+10=+5ms−2
So, at t=0, there is non zero and positive value of velocity and acceleration.