Question

a vehicle is moving with 10m/s velocity breaks are applied and it comes to rest in 20s find acceleration

Answer 1

v=0
u=10
t=20
a=v-u/t
a=0-10/20
a= -1/2
a= -0.5

Answer 2

v = 0
u = 10
v-u = -10
acceleration= v-u/t
So,
answer= -1/2