Meaning of Particle
Dimensions of the object are negligible.
Meaning of Rod
All dimensions but one are negligible, like a pole or beam.
Meaning of Lamina
Object with area but negligible thickness, like a sheet of paper.
Meaning of Uniform Body
Mass is distributed evenly throughout the object.
Meaning of Light Object
Mass of the object is small compared to other masses, like a string or pulley.
Meaning of Inextensible String
A string which does not stretch under load.
Meaning of Rough Surface
If a surface is not smooth, it is rough.
Meaning of Wire
Rigid thin length of metal.
Meaning of Bead
A particle with a hole in it for threading on a wire or string.
Meaning of Peg
A support from which a body can be suspended or rested.
Meaning of Air Resistance
Resistance experienced as an object moves through air.
Meaning of Water Resistance
Resistance experienced as an object moves through water.
Meaning of Drag
Resistance experienced as an object moves through air or water.
Meaning of Gravity
The force of attraction between all objects. Acceleration due to gravity is denoted by g.