21. A body moving with uniform acceleration is having
velocity 2 m/s and 8 m/s at t = 1 s and t = 4 s
respectively. Then average velocity of particle in the
time interval t = 1 s to t = 4 s is
(1) 2 m/s
(2) 3 m/s
(3) 5/3 m/s
(4) 5 m/s
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Answer:
None of these . it is 8 m s^-1.
Average Veocity = Total Distance/ Total time during that interval .
Total Distance = 24 meters
Total Time. = 3 seconds
average Velocity = 24/3 = 8
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