A horizontal force of 20 N is applied to a block of mass 4 kg resting on a rough horizontal table. If the block does not move on the table, how much frictional force the table is applying on the block. What can be said about the coefficient of static friction between the block and the table? `Take g=10m/s^2`.

Explanation

To solve the problem step by step, let's break it down:

### Step 1: Identify the forces acting on the block.
The block has a mass \( m = 4 \, \text{kg} \) and a horizontal force \( F = 20 \, \text{N} \) is applied to it. The block is resting on a rough horizontal table.

### Step 2: Determine the weight of the block.
The weight \( W \) of the block can be calculated using the formula:
\[
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