Answers

2014-04-08T20:14:09+05:30
The velocity is 20 ms-1
if the acceleration is uniform then 
v=at
t=10 s
a=20/10=2 m s-2
then distance travelled
s=t^2=100 m
average velocity=10 ms-1


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2014-04-08T21:08:54+05:30
V=u+at
20=0+a(10)
a=20/10
a=2 m/s^2
avg.velocity=(u+v)/2
                   =0+20/2
                   =10 m/s
from second equation of motion,
s=ut+1/2*a(t^2)
s=0+1/2*2*100
s=100 m
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