Particle (dimensions of the object are negligible) - Mass is concentrated at a single point & rotational forces and air resistance can be ignored, Rod (all dimensions but one are negligible) - Mass concentrated along a line, no thickness and rigid, Lamina (area but negligible thickness) - Mass is distributed across a flat surface, Uniform body (mass distributed evenly) - Mass is concentrated at a single point (the centre of mass), Light object - Tension same at both ends of a light string, Inextensible string - Acceleration the same in connnected objects, Smooth surface - Assume there is no friction, Rough surface - There is a frictional force, Smooth and light pulley - No mass and tension the same either side, Bead - Moves freely along the wire and tension the same either side, Peg - Dimensionless and fixed, Air resistance - Usually modelled as being negligible,

Tabela rankingowa

Styl wizualny

Opcje

Zmień szablon

Przywrócić automatycznie zapisane ćwiczenie: ?