Physics Explanation:

This simulation demonstrates how to calculate the average resistive force acting on a bullet as it penetrates a wooden block.

Given Data:

• Bullet mass (m) = 0.04 kg
• Initial velocity (u) = 90 m/s
• Final velocity (v) = 0 m/s
• Stopping distance (s) = 60 cm = 0.6 m

Calculations:

1. Calculate retardation using kinematic equation:

\[ v^2 = u^2 + 2as \]

\[ 0 = 90^2 + 2a(0.6) \]

\[ a = -\frac{90^2}{2 \times 0.6} = -6750 \, \text{m/s}^2 \]

2. Calculate average resistive force using Newton's Second Law:

\[ F = ma = 0.04 \, \text{kg} \times 6750 \, \text{m/s}^2 = 270 \, \text{N} \]

Note:

The actual resistive force may vary during penetration. This calculation gives the average resistive force over the stopping distance.