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A person walks first at constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is her average speed over the entire trip?
 one year ago
 one year ago
A person walks first at constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is her average speed over the entire trip?
 one year ago
 one year ago

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lgbasalloteBest ResponseYou've already chosen the best response.0
why not just 1? i mean it's simpler isnt it?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
total dist = 2d total time = d/5 + d/3 = 8d/15 so avg speed = 2d/(8d/15) so @A.Avinash_Goutham was right!! yet again! :D
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
so it will be 30/8 seconds?
 one year ago

FoolForMathBest ResponseYou've already chosen the best response.3
When the distance is fixed, just find the harmonic mean.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
what does harmonic mean mean again?
 one year ago

FoolForMathBest ResponseYou've already chosen the best response.3
For two number a and b the harmonic mean is given by 2ab/(a+b)
 one year ago

kropot72Best ResponseYou've already chosen the best response.0
Speed = (distance traveled)/(time taken) Total distance traveled = 0 Speed = 0 m/s
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
where a and b are...?
 one year ago

cwrw238Best ResponseYou've already chosen the best response.0
speed = distance / time if distance = 1 5 = 1 / 0.2 also 3 = 1 / 0.3333 average speed = 2 / 0.53333
 one year ago

FoolForMathBest ResponseYou've already chosen the best response.3
a=5 and b =3 or viceversa
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
its 3.75 m/s 4 is wrong
 one year ago

A.Avinash_GouthamBest ResponseYou've already chosen the best response.0
if it's equal " time " u shud use........arithmetic nd equal dist u shud use..........harmonic
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
this is effective everytime d is equal?
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
total distance /total time travelled
 one year ago

FoolForMathBest ResponseYou've already chosen the best response.3
Yes lgba and when time is equal find the arithmetic mean.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
arithmetic mean is..?
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
2d  d +d   5 3 2d  8d  15 2  8  15
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
2  8  15 15  4
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
lol yeah i got that part =)) btw...a followup question is what is the average velocity...the book says zero...is it because displacement is 0?
 one year ago

A.Avinash_GouthamBest ResponseYou've already chosen the best response.0
yeah it is zero
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
yes,,because disp is 0..
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
but its speed written in the question???
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
the first question was average speed
 one year ago

Nick_BlackBest ResponseYou've already chosen the best response.0
yeah but there is a difference displacement can come to zero bot distance cannot u should mention adds up whether how many time come and go from same point asdisplacement get zero
 one year ago

javawarriorBest ResponseYou've already chosen the best response.0
lol really? at 5m/s ?
 one year ago

javawarriorBest ResponseYou've already chosen the best response.0
A person walks first at constant speed of 5.00 m/s <== that guy must be one heck of a power walker haha
 one year ago
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