A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one
hour to do so,
his average velocity is
h
1) 3 km/h
2) Zero
3)1.5 km/h
4)2 km/h
Answers
Given : A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A.
he takes one hour to do so,
To Find : his average velocity
(a) 3 km/h
(b) zero
(c) 1.5 km/h
(d) 2 km/h
Solution:
Average Velocity = Displacement / Time taken
Displacement = Final Position - Initial Position
Boy starts from A and returns to A
Hence Final Position = Initial Position
=> Displacement = 0
Average Velocity = 0/1 = 0
option (b) zero is correct answer
Additional Info:
Average Speed = Distance / Time
Distance = 1.5 + 1.5 = 3 km
Time taken = 1 hr
Average Speed = 3/1 = 3 km/hr
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Answer:
zero
Explanation:
displeacement will be zero than average velocity = displacement/time
hence avergage velocity = 0