PHYSICS Class 9 Motion
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hope it is understandable
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10√2
Explanation:
He takes 40 s for 1 complete round along square ground
total time elapsed = 2min 20 sec
=2×60 + 20 sec
=140 sec
140 can be written as 120 +20 sec
on 120 sec he will complete 3 rounds and will be back to his same position.
displacement =0
on remaining 20 sec he will cover half of the total distance 10 m to the right and 10 m up.
here shortest distance or displacement =√10^2 +10^2=10√2
and distance =20m
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