Q.18 A body moves along a straight track. Half of the distance it covers with a average velocity of 40 ms and the remaining half with a velocity of 60 ms. What is the average velocity of the whole journey?
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Step-by-step explanation:
Total time T= S/2 (1/40 +1/60) = s(40+60)/2 X 40 X 60 = s/48. And average speed = S/T = 48 ms-1. So average speed is 48 ms-1.
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Answer:
Total time T= S/2 (1/40 +1/60) = s(40+60)/2 X 40 X 60 = s/48.
And average speed = S/T = 48 ms-1.
So average speed is 48 ms^-1.
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