Question

Two blocks are kept in contact as shown in figure. Find forces exerted by surfaces (floor and wall) on blocks.

Answer 1

From free body diagram we conclude that

Net forces in $xdirection+Ydirection$ is zero.

Also we know that

$\therefore N_2=100N$

& $N_1=10\times g=100N$

On balacing the net forces in $xdirection$

$\therefore N_4=N_2=100N$ $[=N_2=100N]$

$\therefore N_4+25\sqrt{3}=N_2$

Similarly for Y direction we get

$\Rightarrow N_4+25\sqrt{3}=100$

$\Rightarrow N_4=100-25\sqrt{3}$

$N_4=56.75N$

Also we know that

$N_3=20g+25$

$N_3=200+25$

$N_3=225N$

Therefore forces exterted on the surfaces are

$N_1=100N,N_3=225N$

$N_4=56.75N$