A train takes 1 hour to go from one station to another. It travel at the speed of 30km/h for first half hour & at 40km/h for the next what is its average velocity
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2
Answer:
Net displacement of the train in coming back to the first station is zero i.e. S=0 .
Average velocity V
avg
=
t
S
=0
Average speed of the train when in moving equal distances is given by ∣V∣
avg
=
v
1
+v
2
2v
1
v
2
⟹ ∣V∣
avg
=
40+60
2×40×60
=48 km/h
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30km/hour & half hour & 40km/hour
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