# Gravity Ruler

The Gravity Ruler explains the relationship between distance and weight. By placing an item at one end of the ruler and bringing it into balance, one can measure the weight of an item in grams.

qty
£ 29.00

### How the Gravity Ruler works

1. To weigh an object, start by placing the ruler on the edge of a table.
2. Place the object at the end of the ruler, on top of the hole.
3. Move the ruler back and forth until it balances. The ruler's back should slightly lift off the table.
4. You can find the weight of the object by looking at the pivot point, or in this case the edge of the table, on the grams scale.

### Technical Specifications

The gravity ruler is precisely engineered to have a shifted centre of balance. By cutting out material from one side of the ruler, we move the centre of balance to our advantage. We then use a scientific principle called "moments" to calculate the centre of balance if a weight is added to the end of the ruler. If you'd like to learn more about the science behind the Gravity Ruler, watch our video.

All our rulers are made in and around London. After they are laser cut, they are hand finished in our London studio, and screen printed by our friends at Luma.

 Material Stainless steel Dimensions 530 x 30 x 1.5 (mm) Units Metric (mm / g) Process Laser cutting, sanding, epoxy screen printing

### Gravity Explained

Did you ever wonder what the difference is between Newtons and Grams? Or how to balance an elephant and an acrobat on a seesaw? Well, our video will answer all of your questions about the wonderful force of Gravity.