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Home  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Laws of Motion

With what acceleration 'a' should the box in the figure descend so that a body of mass M placed in it exerts a force $Mg/4$ on the base

 

\[(a)\;3g/4 \quad (b)\; g/4 \quad (c)\;g/2 \quad(d)\;g/8 \]
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1 Answer

If the box is accelerated downwards
$Mg-N=Ma$
Here $N=\large\frac{Mg}{4}$
$Mg-\large\frac{Mg}{4}$$=Ma$
$a=\large\frac{3g}{4}$
hence a is the correct answer.

 

answered Jul 9, 2013 by meena.p
edited Jan 26, 2014 by meena.p
 

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