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JEE Main 20149 AprilOnline
Exam
JEE Main
Year
2014
Date
9 April
Mode
Online
Subject
Physics
Chapter
Laws of Motion

JEE Main 2014 · 9 April · Online · Physics · Laws of Motion

A block A of mass 4 kg is placed on another block B of mass 5 kg,...

A block A of mass 4 kg is placed on another block B of mass 5 kg, and the block B rests on a smooth horizontal table. If the minimum force that can be applied on A so that both the blocks move together is 12 N, the maximum force that can be applied on B for the blocks to move together will be :

Options

  1. A0 N
  2. B25 N
  3. C48 N
  4. D27 N

Correct answer

A. 0 N

Step-by-step solution

There is an error in this question. Given a smooth horizontal table, there would be no friction between the table and the lower (5 kg) block. As a result the "minimum" force on the upper (4kg) block for both blocks to move together would be 0 N.
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