Question

A block of weight $10\text{N}$ is placed on a horizontal table. A person pushes the block from the top by exerting a downward force of $5\text{N}$ on it. Find the force exerted by the table on the block in equilibrium.

• A. $25\text{N}$
• B. $10\text{N}$
• C. $15\text{N}$
• D. $20\text{N}$

Answer 1

The correct option is C $15\text{N}$

Let the table exert a force of $N$ on the block.

As the block is at rest, the resultant force on it must be zero.

$\therefore$ Total upward force $=$ Total downward force

$\Rightarrow N=5+10$

$\Rightarrow N=15\text{N}$