Question

A body of mass 1 kg lies on smooth inclined plane. The block of mass m is pushed by a force $F=10\text{N}$ horizontally as shown. The magnitude of net normal reaction on the block is :

• A. $10\sqrt{2}\text{N}$
• B. $\frac{10}{\sqrt{2}}\text{N}$
• C. $10\text{N}$
• D. None of these

Answer 1

The correct option is A $10\sqrt{2}\text{N}$

From F.B.D. of block,
$N^2=F^2+(mg{)}^2$


{as there is no acceleration in the direction of $N$}
$N=10\sqrt{2}\text{N}$