Question

The position (x) of a particle changes with time as
x = (2+^+ 3t + 4) m. The average velocity of particle
in time interval from t = 0 to t = 3 s is
(1) 3 m/s
(2) 6 m/s
(3) 9 m/s
(4) 12 m/s​

Answer 1

Answer is 3

2t² + 3t + 4

in 3 seconds its displacement will be --

18 + 9 + 4 = 31

in 0second its displacement will be --

4

Average velocity = 31-4/3 = 27/3= 9 Ans.