Imagine a situation in which the given arrangement is placed inside an elevator that can move only in the vertical direction and compare the situation with the case when it is placed on the ground. Wh

Question

Imagine a situation in which the given arrangement is placed inside an elevator that can move only in the vertical direction and compare the situation with the case when it is placed on the ground. When the elevator accelerates downward with $a_{0} (< g)$ . Coefficient of friction between M and surface in contact is $μ$ while m is smooth, then (pulley and string are ideal)

TestHub · Accepted Answer

In frame of lift (Pseudo force) ⇒ N = M ( g − a 0 ​ ) Since normal decreases, limiting friction decreases. For system to accelerate ​ m ( g − a 0 ​ ) > μ N ​ ⇒ m > μ M ​ ∵ effective gravity decreases, tension in string also decreases

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