Matter: Matter is any thing that occupies space, possesses mass offers resistance to any stress, example Iron, stone, air, Water. Particle: A body of negligible dimension is called a particle. But a particle has mass.
Body: A body consists of a No. of particle, It has definite shape.
Rigid body: A rigid body may be defined as the combination of a large no. of particles, Which occupy fixed position with respect to another, both before and after applying a load. A rigid body may be defined as a body, which can retain its shape and size even if subjected to some external forces. In actual practice, no body is perfectly rigid. But for the shake of simplicity, we take the bodies as rigid bodies.
Mass: The properties of matter by which the action of one body can be compared with that of another is defined as mass.
m = ρ.v
Where,
ρ = Density of body
V = Volume of the body
Weight: Weight of a body is the force with which the body is attracted towards the center of the earth.
Momentum : It is the total motion possessed by a body. It is a vector quantity. It can be expressed as,
Momentum(M) = mass of the body(m) × Velocity(V) Kg-m/sec.
