You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Physics

Distance and Displacement

Lisa is walki...

Question

Lisa is walking in a peculiar fashion. She takes $5$ steps forward and $3$ steps backward, then again $5$ forward and $3$ backward and so on. If each step is of $1 m$ and takes $1$ second to cover, then how much will she be displaced in $34$ seconds from her initial position?

7 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

8 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

9 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

10 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $10 m$
It is given that Lisa walks $5$ steps forward and $3$ steps backward and the length of each step is $1 m$ . Also, she takes 1 sec to take one step. This means she is displaced by $2 m$ in $8$ seconds. Thus, in $32$ seconds she will be displaced by $8 m$ Then in the next two second she will cover $2 m$ and her total displacement becomes $10 m$ in $34$ seconds.

Suggest Corrections

Similar questions

Q. Lisa is walking in a peculiar fashion. She takes

5

steps forward and

3

steps backward, then again

5

forward and

3

backward and so on. If each step is of

1 m

and takes

1

second to cover, then how much will she be displaced in

34

seconds from her initial position?

Q. A drunkard walking in a narrow lane takes

5

steps forward and

3

steps backward, followed again

5

steps forward and

3

steps backward, and so on. Each step is

1 m

long and requires Is. Determine how long the drunkard takes to fall in a pit

13 m

away from the start.

A drunkard walking in a narrow lane takes 8 steps forward and 6 steps backward , followed again by 8 steps forward and 6 steps backward and so on . Each Step is 1 metre long and requires 1second . Determine how long the drunkard takes to fall in a pit 18m away from the start.

Q. A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward,followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x-t graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.

Q. A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x-t graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.

Join BYJU'S Learning Program