It tells about the strength of motion understanding

“It is the product of mass and velocity of a body.”

SI Unit: Ns
Vector quality

Change in Momentum

Force

Force is the rate of change of momentum

SI Unit: Newton(N)
Vector Quantity

Graph

Law of Conservation of Momentum

Elastic collision

Inelastic collision

1. Ideal collision

2. No loss of energy as heat to surrounding to surrounding

3. No resistive forces like fiction during collision

Momentum: conserved

Kinetic energy: conserved

Total energy: conserved

e.g. small masses colliding one another, like atoms.

1. Real collision

2. Energy lost as heat to surrounding

3. Resistive forces e.g. friction exist during collision

Momentum: conserved

Kinetic energy: not conserved

Total energy: conserved

e.g. collision of large particles, explosion, bodies stick after collision.

“For an isolated / closed system, the total momentum of bodies before collision is equal to the before collision is equal to the total momentum after collision.”

Example # 1 (same direction)

Example #2 (opposite direction)

Example #3 (sticking upon collision)

Example #4 (Explosion)

O-Level Momentum