A particle moving in a straight line covers the first
half of distance with speed of 12 m/s and the other
half of the distance in two equal time intervals with
speed of 18 m/s and 30 m/s respectively. The
average speed of particle during motion is
(1) 16 m/s
(2) 24 m/s
(3) 18 m/s
(4) 12 m/s
Answers
Answered by
1
Answer:
t
1
=
3
2
S
=
6
S
2
S
=4.5×t
2
+7.5t
3
⇒12t
2
=
2
S
We have t
2
=t
3
Total time t=t
1
+t
2
+t
3
=
6
S
+
24
S
+
24
S
=
4
S
Average of
t
S
=
4
S
S
=4m/s
Explanation:
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