Question

a bus starts from rest and attains 40 km per hour velocity after 10 second calculate the acceleration of the bus in kilometre per hour square and metre per second square

Answer 1

u,initial velocity=0(at rest)
v,final velocity=40km/hr
10 sec= 10×1/(60×60)hr
Acceleration at that period=(v-u)/time
={(40-0)×60×60}/10km /hr^2
=14400km/hr^2
=(14400×1000)/60×60×60×60m/s^
=0.9m/s^2