# Net Force on a Crash Dummy's Head During Automobile Collision

## What is the HIC in this collision?

Express your answer in seconds.

## Answer:

The HIC in this collision will be 1108.05 seconds.

The head injury criterion (HIC) is a measure used to assess the likelihood of head injuries resulting from various collisions. An HIC greater than 1000 seconds indicates a high risk of severe injuries or even death.

The average acceleration during the collision can be calculated as:

= Force / Mass

= 2000 Newton / 4.5 kg

= 444.44 meters per second squared

The time difference during the collision is:

Change in time = 100 milliseconds - 20 milliseconds

= 80,000 seconds

Using the HIC formula: HIC = (444.44 m/s² / 9.8 m/s²)^2.5 * 80,000 s

This results in an HIC of 1108.05 seconds.