# Auto Safety

 Materials: None Time Allotment: 2 Class Days

### Overview:

This makeup lab is unique from most others in that it does not actually involve a laboratory exercise. Rather, this makeup lab involves the completion of a writing assignment which demonstrates your understanding of the impulse-momentum change theorem.

### The Assignment:

The impulse - momentum change theorem identifies the various factors which effect the amount of force exerted on an object during a collision. This theorem has inescapable implications upon the safety of passengers in automobiles. Write several paragraphs in which you

• identify the three factors which influence the contact force.
• discuss the effect (direct or inverse) which each factor has upon the amount of force experienced by an object.
• extend the principles in order to postulate the variables which will influence the amount of force experienced by a car in a car collision.
• clearly explain what factors will minimize damage and maximize safety in a collision.
• identify at least two safety features present on cars which serve to protect both the car and the passengers.
• in light of these physics principles, explain why these various safety features are added to automobiles.

In your writing, use complete sentences and the language of physics.

### Assessment:

Your writing assignment/makeup lab will be assessed using the following scoring rubric.

### 1. "Technical Merit"

Demonstrated a clear understanding of the variables effecting the forces acting upon a passenger; applied the momentum-impulse theorem to produce an intelligent discussion of auto safety principles.

0 - 3

Discussions and explanations are brief and hasty; effectiveness of writing is hindered by many serious errors or omissions; demonstrated little or no understanding of physics

4 - 5

Discussions and explanations are superficial; attention not given to specifics of the physics; too vague;includes a few detrimental errors

6 - 7

Discussion and explanations involve depth and specifics; analysis and applications were clear and organized; demonstrated a perfect understanding and application of physics

### 2. "Artistic Expression"

Writing was word processed and layout was neat, organized, and attractive; writing reflects an organized and sequential flow of ideas and effective transitions.

0

Layout is sloppy; appears to have been hastily done during the available 15 minutes prior to class; demonstrates a lack of pride in one's work.

1 - 2

Word processor was used; layout and/or writing lacks organization and neatness.

#### 3

Word processor was used; layout was organized and neat; thoughts were expressed fluently.