a car is moving with a velocity 12m/s and stops within 5s find its retardation.​

u=12m/s

v=0m/s(final velocity is zero because it will be at rest after stopping

t=5s

a=v-u/t

[tex]a = \frac{v – u}{t} [/tex]

[tex]a = \frac{0 – 12}{5} [/tex]

[tex]a = \frac{ – 12}{5} [/tex]

[tex]a = – 2.5m[/tex]

therefore retardation is -2.5m/s^2