Question

A bus was moving with a speed of 54km/hrs on applying brake it is stopped in 8sec calculate the acceleration

Answer 1

hope it helps ☺
see attachment

Answer 2

a=Vf-Vi/t
a=0-15/8   (we multiply 54 by 1000 and divided by 3600 to change it in m/s)
a=-15/8
a=1.875m/s