7. A train travels with a speed of 60 km h-' from
station A to station B and then comes back with a
speed 80 km h-' from station B to station A. Find :
(i) the average speed, and (ii) the average velocity
of train.
Answers
Answer:
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Secondary SchoolPhysics 10 points
Train travels with a speed of 60km/hr from station A to B and then comes back to with a speed 80 km/hr from B to A. find average speed
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Answers
JunaidMirza
JunaidMirza
Average speed = 2v1v2 / (v1 + v2)
= 2 * 60 * 80 / (60 + 80)
= 9600 / 140
= 96/14 km/h
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JunaidMirza
Sorry it’s 960/14 km/hr
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bestanswers Virtuoso
Answer:
Average speed of the train…
Explanation:
Now what you give here is the following information:-
S1 (speed of train from A to B) = 60 Km/hr.
S2 (speed of train from B to A) = 80 Km/hr.
You asked to calculate average speed of the train.
Here Average speed is equal to the speed of train in going from A to B and then back from B to A
As we know, Average = S2 + S1 / 2
So, we have 80 + 60 / 2
= 140 km / hr / 2
= 70 km/hr.
So the average speed of the train is 70 km/hr. (keeping in mind that no other factors changed)