The second experiment I will do is the compound pendulum, with this I will be able to work out the time period, and see if there is a relationship between the sag and time period. Nice to have metal ends so the wood can't split but the metal conceals the first centimetre and a half and the last 1+1/2 . The length of the rule may not have been exactly correct, as all I did was lay it on the table therefore it could have moved when I was adding weights or not been place accurately. This involves checking things like the connection between the nail and the clamp in experiment 2 as well as the retort stand. It is a number indicative of stiffness, not of strength, and only applies to conditions within the elastic limit.

Sew Easy Wooden Metre Stick Ruler | Hobbycraft

I could have tested shorter lengths, this would have allowed me to really see if the pendulum and sag has any similarities when the length was constant. This point is known as the ~elastic limit~, which may be defined as the limit beyond which it is impossible to carry the distortion of a body without producing a permanent alteration in shape.The reason it curved was just like the reason the wood curved, this was because the bonds were reaching its elastic limit. The metric machinist ruler is divided into millimetres or half-millimetre increments, allowing small, precise measurements to be taken with accuracy. Elastic limit as measured in tests and used in design may be defined as that unit stress at which the deformation begins to increase in a faster ratio than the applied load. The wooden tool features both metric and imperial measurements and is made from high quality timber. To make sure that I do not move when I am taking the readings so that I get the correct results as much as possible.

Wooden Meter Ruler - Etsy UK Wooden Meter Ruler - Etsy UK

Were it not for this property it would be impossible to dry wood without destroying completely its cohesion, due to the irregularity of shrinkage. Mistakes can be made when making measurements or when choosing the moment start/stop the stopwatch as the rule is released and stopped. This would also make it quicker to change the distances as the two objects would just need to be moved closer.

Transparent plastic rulers allow an unobstructed view of the surface underneath for precise measuring and drawing.