Dynamics

What is momentum?

The momentum of a particle is defined as the product of its mass and its velocity

or p = m . v

Vector Quantity

Example: When we shoot using a gun, the momentum are the bullet and the gun when it moves backwards.

Conservation of Momentum

p = p1 + p2 = constant

one object divided into two objects

p1 = p2

momentum before = momentum after

NEWTON'S LAW

FIrst Law

Every body continues in its state of rest, or of uniform motion in a straigh line, unless compelled to change that state by a net force.

p = constant

Second Law

The resultant force acting on a body is equal to the rate of change of its momentum

F = ma = m(Δv/Δt)= Δ(mv)/Δt = Δp/Δt

Third Law

When two bodies exert action and reaction forces on each other, their changes of momentum are equal and opposite

#Physics