Question

What is momentum?And its expression?

Answer 1

Momentum can be defined as "mass in motion." All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion. The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving. Momentum depends upon the variablesmass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.Momentum = mass • velocity. In physics, the symbol for the quantity momentum is the lower case p. Thus, the above equation can be rewritten as p = m • v

Answer 2

Momentum(p) is defined as the quantity of motion contained in a body.
It is a vector quantity with its magnitude |mv| and its direction is same as the direction of velocity.
m = mass of body
v = velocity of the body