Question

A bus decrease it's speed from 80km/h to 60km/h in 10 sec. find the acceleration of the bus. Also find the distance covered by bus

Answer 1

v=80km/h
=80×100/3600
=2.23m/s
u=60km/h
=60×100/3600
=1.67m/s
t =10 s
a= v-u/t
= 2.23-1.67/10
= 2.063 m/s square.

Answer 2

Given:

Initial velocity(u) =80km\h

=80×5|18

=22.2 m/s

Final velocity(v) = 60km/h

=60×5/18

=16.6m/s

Time=10s

A=v-u/t

=16.6-22.2/10

=166×22.2

=3685.2

S=ut+1/2atsquare

=22.2×10+1/2×3685.2×10×10

=222+1/2×368520

=184482

Hope this really helps you