Chapter 2, Problem 57AP

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# A bullet is fired through a board 10.0 cm thick in such a way that the bullet’s line of motion is perpendicular to the face of the board. If the initial speed of the bullet is 4.00 × 102 m/s and it emerges from the other side of the board with a speed of 3.00 × 102 m/s, find (a) the acceleration of the bullet as it passes through the board and (b) the total time the bullet is in contact with the board.

(a)

To determine
The acceleration of the bullet.

Explanation

Given Info: The initial velocity of the bullet is 400â€‰m/s , the final velocity of the bullet is 300â€‰m/s , and the displacement of the bullet is 0.100â€‰m .

Explanation:

The formula used to calculate the acceleration of the bullet is,

a=v2âˆ’v022Î”x

Here,

v is the final velocity of the bullet

v0 is the initial velocity of the bullet

a is the acceleration of the bullet

Î”x is the displacement of the bullet

Substitute 400â€‰m/s for v0 , 300â€‰m/s for v and 0.100â€‰m for Î”x to find a

(b)

To determine
The time of contact of the bullet with the board.

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