A bullet weighing 10 g is fired with a velocity of `800 ms^(-1)`. After passing through a mud wall 1 m thick, its velocity decreases to `100 ms^(-1)`. Find the average resistance offered by the mud wall.

Explanation

To solve the problem, we will use the work-energy theorem, which states that the work done by the forces acting on an object is equal to the change in its kinetic energy.

### Step-by-Step Solution:

1. **Convert the mass of the bullet to kilograms:**
\[ m = 10 \, \text{g} = \frac{10}{1000} \, \text{kg} = 0.01 \, \text{kg} \]
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