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yorick
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[SOLVED] Average speed with an unknown distance
You travel from Place A to Place B, half the time at a speed of 60km/h and the other half at 100km/h. On the return journey, you travel half the distance at 60km/h, and the other half at 100km/h.
a) What is your average speed from A to B?
b) What is your average speed from B to A (return journey)?
c) What is your average speed for the entire trip?
a) [tex]\overline{Sp}[/tex] = (60 + 100)/2 = 80km/h... Easy enough.
b&c)
I just don't know where to start with this.
I tried a displacement vs. time graph but without any actual values for the displacement I didn't know what to do.
I'm not necessarily after an answer for this, but a nudge in the right direction would be greatly appreciated.
Thanks,
Yorick.
You travel from Place A to Place B, half the time at a speed of 60km/h and the other half at 100km/h. On the return journey, you travel half the distance at 60km/h, and the other half at 100km/h.
a) What is your average speed from A to B?
b) What is your average speed from B to A (return journey)?
c) What is your average speed for the entire trip?
a) [tex]\overline{Sp}[/tex] = (60 + 100)/2 = 80km/h... Easy enough.
b&c)
I just don't know where to start with this.
I tried a displacement vs. time graph but without any actual values for the displacement I didn't know what to do.
I'm not necessarily after an answer for this, but a nudge in the right direction would be greatly appreciated.
Thanks,
Yorick.