What is the acceleration of a bullet passing through a board?

[fiziks09]

Hello, please any help will be very much appreciated;

A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board?

 

[JaredJames]

Hi there, this belongs in the homework section.

Jared

 

[JaredJames]

Using: v² = u² + 2as

Where s = distance, u = initial speed, v = final speed and a = acceleration.

You know s, u and v. Plug them in and rearrange to give an answer for a.

Don't forget to convert cm to m.

We cannot give you direct answers as per the guidelines, but we can help, however in future you must show your attempt.

Jared

 

[fiziks09]

Oh thanks very much...