The velocity of a particle depends upon as $v = a + bt + c{t^2}$; if the velocity is in $m/\sec $, the unit of $a$ will be
A$m/\sec $
B$m/{\sec ^2}$
C${m^2}/\sec $
D$m/{\sec ^3}$
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A$m/\sec $
a (a) Quantities of similar dimensions can be added or subtracted so unit of $a $ will be same as that of velocity.
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