Question

a bus is moving at a speed of 18 km/h. it is retarding at a rate of 2 m/s^2 and comes to rest finally. find the distance travelled by it.​

Answer 1

Given

Initial velocity=18km/h=18*5/18

=5m/sec

Final velocity= 0

retardation = -2m/sec square

Distance= ?

${v}^{2} = {u }^{2} + 2as$

${0}^{2} = {5}^{2} + 2( - 2)(s)$

0=25-4s

25 =-4s

25/-4=s

6.25=s

Distance= 6.25m