Answers

2015-07-06T21:35:57+05:30
Final velocity 40km/h
time 30 min
initial velocity 0
a=v-u/t
à= 40 - 0/ 30
a 40/30


0
A doubt! U should convert km/h to m/s first
2015-07-08T22:51:03+05:30
U=0
v=40km/h=40×5/18=11.111m/s
t=30min=30×60=1800
a=v-u/t
a=11.111-0/1800
a=11.111/1800
a=0.0061727778
0