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Question

There is a box of 70 kg on a rough surface and Ram is just able to pull the box by applying a force of F1 (Figure1) Avinash tries to pull the same box but in different orientation (figure (ii)). He had to apply force F2 is order to just move the box. Who had to apply a lesser force in order to just move the box?


  1. (a)Both applied same force

  2. Ram

  3. Avinash

  4. (a)Can't say until coefficient of friction is given.


Solution

The correct option is A

(a)Both applied same force


Ram's Case :- 

So to be able to move it

F1  fr

Fr = μN = μ 70g

F1  μ 70g

F1= μ 70g

Avinash's case:-

F2  fr

F2  μ70g

F2μ70g

So to just move the blocks the force was same. 

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