Question

a car moving with an initial velocity of 25m/s is brought to nxt in 20 sec. calculate the acceleration

Answer 1

a=v-u/t
a=25-0/20
a=1.25m/s^2

Answer 2

here initial velocity,u=25m/s and time =20sec and final velocity(v)=0m/s
just use first equation of motion --v=u+at
0=25+20t
t=1.25sec