Question

a bus decrease its speed from 80km h-1 to 60 km h-1 in 5s. find the acceleration of the bus​

Answer 1

Answer:

acceleration = final velocity -initial velocity by time taken

i.e v-u÷t

80-60÷5

=20÷5

=4ms^2

Answer 2

According to question,
Initial speed of bus=80x5/18
=22.22m/s
Final speed of bus=60x5/18
=16.66m/s
Time=5s

As we know,
v=u+at
22.22=16.66+a(5)
22.22-16.66=a(5)
5.56/5=a
a=1.12 m/s^2