# Acceleration given velocity and distance

## Homework Statement

A car traveling at 90 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.86 m. What was the average acceleration in g's of the driver during the collision?

## The Attempt at a Solution

The acceleration in m/s/s is -363.37 but I tried dividing by 9.8 and I got -37.05 g's but evidently thats wrong. I'm not sure what I'm missing here, I converted the km/h into m/s/s then got the correct acceleration then devided by 9.81. Is there a rule that I didn't use? Is there a limit on negative gs?

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