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

# An up escalator is going at the rate of 10 step/min. How many steps per min should I move down on it as to look like that I am at rest to a person standing on ground.

A

0 steps

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B

20 steps

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C

10 steps

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

5 steps

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is C 10 steps So in the same time you have to come down by 10 steps so as to remain at the 5th step. So technically after a minute also your displacement is 0. Hence your velocity = 0, w.r.t. a person on ground. Also, mathematically = Velocity of lift w.r.t to ground = 10 steps/min = Vman with respect to ground = 0 as the man's position shouldn't change in time. Now question asks how much should you move down on a moving lift? = Velocity of man w.r.t. lift = vm−vl = 0 - 10 = - 10 steps/min This means man should come down 10 steps per minute on the moving lift.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program