Question

a bicycle increases its velocity from 10 kilometre per hour to 15 km per hour in 6 seconds calculate its acceleration

Answer 1

u=10km/h =10×5/18=50/18m/s
v=15km/h=15×5/18=75/18m/s
t=6 sec
a=v-u/t
a=75/18 - 50/18 /6
=25/18×6 =25/108 m/sec^2

Answer 2

Acceleration = (v-u)/t
u=10km/hr
v=15km/hr
t=6sec=60/3600=1/60

Therefore, acceleration is:-
(15-10)/1/60
=5*60
=300km/hr