Physics · MOTION IN A STRAIGHT LINE

A bullet entering a wooden block with an initial velocity of \( 100\text{ m s}^{-1} \) comes to rest after penetrating a distance of \( 0.1\text{ m} \). Assuming uniform retardation, what is the magnitude of the deceleration of the bullet?

1. A
   \( 5 \times 10^3\text{ m s}^{-2} \)
2. B
   \( 1 \times 10^5\text{ m s}^{-2} \)
3. C
   \( 2.5 \times 10^4\text{ m s}^{-2} \)
4. D
   \( 5 \times 10^4\text{ m s}^{-2} \)