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  4. The elevator shown in figure is descending, with an acceleration of 2 m s -2 . The mass of the block A is 0.5 kg and the mass of the block B is 1 kg . The force exerted by the block A on the block B is (Take .g=10 m s -2) <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/e841a112b0ed01066a148b0440cf8ee7-.png />

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Q. The elevator shown in figure is descending, with an acceleration of $2 \,m \,s ^{-2} .$ The mass of the block $A$ is $0.5\, kg$ and the mass of the block $B$ is $1\, kg .$ The force exerted by the block $A$ on the block $B$ is (Take $\left.g=10\, m\, s ^{-2}\right)$
image

Laws of Motion

Solution:

From free body diagram of block $A$
$0.5 g-N=0.5 \times 2 $
or $N=0.5 g-0.5 \times 2 $
$=0.5(10-2)=4 N$
image