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# How would I determine the overturni

## How would I determine the overturni

(OP)
How would I determine the overturning moment of a vehicle on tracks braking whilst on an 11deg decline.
Replies continue below

### RE: How would I determine the overturni

This is for a train, on level tracks, but it should get you started.

### RE: How would I determine the overturni

The overturning moment is ma times the distance from the CG perpendicular to the roadway.

For toppling, the W = mg force vector acts vertically downwards through the CG. The decel force vector F = ma acts in the direction of motion. Sum those two vectors to get a new resultant vector acting through the CG. If the new vector intersects the ground ahead of front wheel, the vehicle will topple.

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