A bullet of mass 0.06 kg moving with a speed of `90ms^(-1)` enters a heavy wooden block and it stopped after a distance of 60 cm. What is the average resistive force exerted by the block on the bullet ?

Explanation

To find the average resistive force exerted by the block on the bullet, we can use the work-energy principle. The work done by the resistive force is equal to the change in kinetic energy of the bullet.

### Step 1: Calculate the initial kinetic energy of the bullet.
The kinetic energy (KE) can be calculated using the formula:
\[ KE = \frac{1}{2} mv^2 \]
where:
- \( m = 0.06 \, \text{kg} \) (mass of the bullet)
- \( v = 90 \, \text{m/s} \) (initial speed of the bullet)
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