A body travels along a straight line for the first half of the total time with a constant speed of 20 m s^(-1) and for the second half of the total time with a constant speed of 30 m s^(-1) . Find the average speed of the body.
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Answer:
When time intervals are equal.. The avg speed is gng to be v1+v2/2
Explanation:
V1=20
V2=30
So...20+30/2=25
Answered by
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Explanation:
s=d/t
20=d1/t
d1=20t
30=d2/t
d2=30t
in both case time is same
avg speed = total distance / total time
= d1+d2/t+t
=20t+30t/2t
=50t/2t
=50/2
=25m/s
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