Question

A bus running at a speed of 18 km/h is stopped in 2.5 seconds by applying brakes. calculate the ratardation produce.

Answer 1

v=0; u=18km/hr=5m/s; t=2.5s
v=u+at
0=5+a*2.5
0-5=2.5*a
-5/2.5=a
-50/25=a
-2 m/s=a