A bird flies at 10ms\(^{-1}\) for 3s, 15ms\(^{-1}\) for 3s and 20 ms\(^{-1}\) for 4s. Calculate the bird's average speed
4.5 ms-1
15.0 ms-1
15.5 ms-1
51.7 ms-1
Explanation
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Discussions (6)
recall that. average speed = total distance÷ total time......since distance was not given,we calc distance with the formula ....s=ut+1\2 at^2....
......substituting ur values......for d first parameters given, velocity =10m|s and time =3secs...from d above formula , s=10×3+1\2×0×3^2......s=30+0=30m.......... second parameters. ....s=15×3+0=45m......then for d last parameters,..... s=20×4+0=80m.................now we have gotten all d distance we can now calculate our average speed.......average speed =tot.distance÷tot.time........total distance =30+45+80=155.......total time =3+3+4=10.........average speed =155÷10=15.5m|s........I hope it has helped someone
The question is wrongly composed:
the solving and the ansa provided are contradicting please, rectify dis prob ,abeg!!!
