A body travelling along a straight line path
travels first half of the distance with a velocity
7 ms-1. During the travel time of the second
half of the distance, first half time is travelled
with a velocity 14 ms-1 and the second half
time is travelled with a velocity 21 ms-1. Then
the average velocity of the body during the
journey is
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Answer:
Let total distance d
Let time covered for first one third distance bet
1
Then t
1
=
4
d/3
=
12
d
t
2
be time for next two journeys
d−
3
d
=
3
2d
=2t
2
+6t
2
=8t
2
t
2
=
12
d
Averagevelocity=
Totaltime
Totaldistane
=
t
1
+2t
2
d
=
12
d
+
12
2d
d
=4m/s
Explanation:
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