B-3.A body covers first part of its...
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B-3.A body covers first part of its journey with a velocity of 2 m/s, next part with a velocity of 3 rest of the journey with a velocity 6m/s. The average velocity of the body will be (A) 3 m/s (B) I mis c )mis (0) – mis

JEE/Engineering Exams
Physics
Solution
108
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Anerye werity = sisplacemer Let us assame the total diallace, most is S So for the ist pait the displacement ( =frac{S / 3}{2} ) nelouty similasly for the ( 2^{n} ) pact ( overline{lim }=frac{s / 3}{3} ) ( 3^{text {rd }} ) part time ( =frac{s / 3}{6} ) ( sin tan e=frac{3}{6}+frac{5}{9}+frac{5}{18}=frac{5(3+2+1)}{18}=frac{S(6)}{18}=frac{5}{3} ) ( therefore ) Avierage relouty ( =frac{s}{s / 3}=frac{53}{s}=[3 mathrm{m} / mathrm{s} )
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