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  4. Two blocks of mass 6kg and 4kg are pushed along a horizontal frictionless surface by a force of 40N applied to the 6kg block at an angle of 60° to the horizontal. The force that the 4kg block exerts on the 6kg block is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-ojfvvv4nuuscyvc8.jpg />

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Q. Two blocks of mass $6kg$ and $4kg$ are pushed along a horizontal frictionless surface by a force of $40N$ applied to the $6kg$ block at an angle of $60^\circ $ to the horizontal. The force that the $4kg$ block exerts on the $6kg$ block is
Question

NTA AbhyasNTA Abhyas 2020

Solution:

Acceleration of the system (a) $=20/10m/s^{2}=2m/s^{2}$
Force by $4kg$ block on $6kg$ block
$=$ force by $6kg$ block on $4kg$ block $=4\times 2N=8N$
$=4\times 2N=8N$