An object starts from rest at the origin and moves along the x axis with a constant acceleration
of 4m/s2. Its average velocity as it goes from x = 2m to x = 8m is:
A. 1m/s
B. 2m/s
C. 3m/s
D. 5m/s
E. 6m/s
ans: E

s=ut+at^2/2. as u=o given s=at^2/2. 2=4t^2/2. by calculations t=1. again 8=4t^2/2. by calculations t=2 sec average speed=distance travel/time taken. averae=8~2/2~1=6/1=6 m/s

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