CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 20 m is 25 seconds to reach the bookshop. After buying a book, he travels the same distance at the same time to reach back in the classroom. Find (a) average speed, and (b) average velocity, of the boy.


Solution

A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 20 m in 25 seconds to reach the bookshop
Distance from classroom to bookshop = 20m
Time = 25sec
After buying a book, he travels the same distance at the same time to reach back into the classroom.
(a) Average speed =  Total DistanceTotal Time20+2025+254050 = 0.8 m/s
(b) Average velocity=  DisplacementTime
 As displacement is the shortest path between source and destination.
Here, displacement = 0, because child travels 20m forward and travels 20 m backward.
Displacement = 20 - 20 = 0
Hence, average velocity = 050 = 0 m/s


Physics
Science for Ninth Class - Part I - Physics
Standard IX

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More


similar_icon
People also searched for
View More



footer-image