23.
A graph of acceleration versus time of a particle starting
from rest at t=0 is as shown in figure. The speed of the
particle at t=14s is
*
TTTTTT
O
acceleration
2 14 16 18 710 712 714
t(in sec)
+
(1)
(3)
2 ms'
20 ms
(2) 34 ms'
(4) 42 ms
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