Question

A car moving with an intial velocity of 25m/s his brought to rest in 20s calculate he acceleration

Answer 1

v = 0
u = 25 m/sec
t = 20 s

a = (v-u) / t
a = (0 - 25 ) / 20
a = -25/20
a = -5/4

ANSWER = -5/4 m/sec^2 OR -1.25 m/sec^2