A bullet moving with a speed of 120 m/s is able to penetrate through 5 cm into a thick wooden board. Calculate the required velocity of bullet to penetrate through 8 cm in the same wooden board .

Explanation

To solve the problem of determining the required velocity of a bullet to penetrate 8 cm into a wooden board, we can use the principles of uniformly accelerated motion. Here's a step-by-step breakdown of the solution:

### Step 1: Understand the initial conditions
We know that:
- The initial velocity of the bullet (u) = 120 m/s
- The penetration depth (s1) = 5 cm = 0.05 m

### Step 2: Apply the equation of motion
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