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  4. The elevator shown in figure is descending with an acceleration of 2 ms-2 The mass of the block A = 0.5 kg. The force exerted by the block A on the block B is: Take g = 10 m/s2 <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/73d73c5d007799436e3c062f4538eecf-.png />

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Q. The elevator shown in figure is descending with an acceleration of $2 \,ms^{-2}$ The mass of the block $A = 0.5\, kg$. The force exerted by the block A on the block B is: Take $g = 10 \,m/s^{2}$
image

Laws of Motion

Solution:

Let $A$ applies a force $R$ on $B$,
Then B also applies an opposite force R on A as shown
image
For $A : mg -R =ma$
$\Rightarrow R=m(g-a)$
$=0.5[10-2] =4\,N$