You are Here: Home >< Physics

# Physics - Moments, Turning Points, Tipping Points watch

1. Could someone please explain how the shape of an object affects its stability - and what does do the terms pivot, moment and line of action of weight have to do with this?
2. The greater the surface area of the base of an object, the greater its stability. Think about trying to balance a toothpick on its end... It would just tip over. In order for an object to be stable, you want its centre of mass to be in the middle of its area that touches the ground. A pivot is a point about which an object can gain a turning force or a moment, where the moment applied is equal to the "Force X Perpendicular distance from pivot". The line of action of the weight is the same as the centre of mass. I hope this helps!
3. (Original post by Goal94)
The greater the surface area of the base of an object, the greater its stability. Think about trying to balance a toothpick on its end... It would just tip over. In order for an object to be stable, you want its centre of mass to be in the middle of its area that touches the ground. A pivot is a point about which an object can gain a turning force or a moment, where the moment applied is equal to the "Force X Perpendicular distance from pivot". The line of action of the weight is the same as the centre of mass. I hope this helps!
Yes, thank you so much

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 9, 2017
Today on TSR

### Summer Bucket List is Back!

Start yours and you could win £150!

### GCSE Physics Equations sheet!

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE