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  4. Two blocks of mass m and M are connected by a massless thread which passes over a fixed massless pulley. The table under M is smooth. The force exerted by the pulley on the table is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-vpn8iz4kaypb.png />

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Q. Two blocks of mass $m$ and $M$ are connected by a massless thread which passes over a fixed massless pulley. The table under $M$ is smooth. The force exerted by the pulley on the table is

Question

NTA AbhyasNTA Abhyas 2020Laws of Motion

Solution:

$\left(m + M\right)a=mg$
$a=\frac{m g}{M + m}$
$T=\frac{M m g}{M + m}$
Solution
$N=T\sqrt{2}=\frac{M m g \sqrt{2}}{M + m}$