Question

A car decreases its speed from 100 KM per hour to 80 km per hour in 10 second calculate the acceleration of the car

Answer 1

u= initial velocity= 100km/h = 27.77m/s

v= final velocity = 80 km/h = 22.22m/s

t= time = 10 sec

a= acceleration = ?

a=v-u/t

a= (22.22-27.77)/10

a= -5.55/10

Therefore, a= - 0.55 m/sec2