Maths Mechanics- Modelling Assumptions

Object modelled as particle

-Mass of object is concentrated at single point
-Rotational forces and air resistance can be ignored

Uniform body

- Mass is concentrated at the centre

Light object

Mass is negligible
In light string, tension is equal at both ends

Inextensible string

Acceleration is constant for all objects connected by string.

Smooth surface

No friction

Air resistance.

Usually modelled as negligible

Gravity

Gravity is uniform on Earth, acts vertically downwards.
9.8 ms-1