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A drunkard is walking along a straight r...

A drunkard is walking along a straight road. He takes five steps forward and three steps backward and so on. Each step is `1 m` long and takes `1 s`. There is a pit on the road `11 m`, away from the starting point.
The three initial and final positions of a man on the x-axis are given as
(i) (-3 m, 7 m) (ii) (7 m, -3 m)
(iii) (-7 m, 3 m)

A

(i)

B

(ii)

C

(iii)

D

i) and iii)

Text Solution

Verified by Experts

The correct Answer is:
B
(b) : Displacement = Final position - Initial position
`delta x = x_2 - x_1`
Then,
(i) `delta x` = 7 m - (-3 m) = 10 m
(ii) `delta x` = - 3 m - 7 m = - 10 m
`delta x` = - 3 m - (- 7 m) = 10 m
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