Flashcards
Modelling in Mechanics
Cards in this deck (16)
- 1ParticleThe mass is considered to be concentrated at a single point. This means we can ignore air-resistance and rotational effects because there are no dimensions.
- 2RodAn object with one dimension e.g ruler, pencil. This means the mass can be considered equally distributed along a straight line. A rod has no thickness and doesn't bend or buckle.
- 3LaminaA 2D object. The mass is considered equally distributed across the flat surface.
- 4Uniform BodyAn object with uniform density. This allows the mass to be considered concentrated at a single point at the geometrical centre of the body.
- 5Light ObjectAn object which has a very small mass in comparison with other objects. We treat it as having 0 mass.
- 6Inextensible StringA string that does not stretch under a load.
- 7Inelastic stringA string that does not stretch under a load.
- 8Smooth SurfaceTo model a surface as smooth means to ignore the effects of friction.
- 9Rough SurfaceYou need to consider the effects of friction when using rough surfaces.
- 10WireA rigid, thin length of metal, which is treated as being one dimensional. A wire can be smooth or rough.
- 11Smooth and light pulleyA pulley which has no friction and no mass.
- 12BeadA particle which is threaded onto and moves freely along a wire or string.
- 13PegA point of suspension. A peg is treated as being dimensionless and is usually fixed. A peg can be rough or smooth.
- 14Air ResistanceFriction against an object as it moves through the air. Treated in M1 as negligible.
- 15WindWind can be ignored unless specifically mentioned.
- 16GravityThe attraction of all objects to the Earth. We take acceleration due to gravity as 9.8ms^-2
Information
- Description
- Definitions of words regarding models and when they are used.
- Created by
- Matthew Young
- Views
- 65
- Tags
- Rating